diff --git a/caddy/config.go b/caddy/config.go
index 6a311ee8..4f33afb5 100644
--- a/caddy/config.go
+++ b/caddy/config.go
@@ -226,7 +226,7 @@ func arrangeBindings(allConfigs []server.Config) (Group, error) {
 			return groupings, fatalErr
 		}
 		if warnErr != nil {
-			log.Println("[Warning]", warnErr)
+			log.Printf("[WARNING] Resolving bind address for %s: %v", conf.Address(), warnErr)
 		}
 
 		// Make sure to compare the string representation of the address,
diff --git a/caddy/letsencrypt/maintain.go b/caddy/letsencrypt/maintain.go
index 62c71428..8f141657 100644
--- a/caddy/letsencrypt/maintain.go
+++ b/caddy/letsencrypt/maintain.go
@@ -36,24 +36,24 @@ func maintainAssets(configs []server.Config, stopChan chan struct{}) {
 			n, errs := renewCertificates(configs, true)
 			if len(errs) > 0 {
 				for _, err := range errs {
-					log.Printf("[ERROR] cert renewal: %v\n", err)
+					log.Printf("[ERROR] Certificate renewal: %v", err)
 				}
 			}
 			// even if there was an error, some renewals may have succeeded
 			if n > 0 && OnChange != nil {
 				err := OnChange()
 				if err != nil {
-					log.Printf("[ERROR] onchange after cert renewal: %v\n", err)
+					log.Printf("[ERROR] OnChange after cert renewal: %v", err)
 				}
 			}
 		case <-ocspTicker.C:
 			for bundle, oldStatus := range ocspStatus {
 				_, newStatus, err := acme.GetOCSPForCert(*bundle)
 				if err == nil && newStatus != oldStatus && OnChange != nil {
-					log.Printf("[INFO] ocsp status changed from %v to %v\n", oldStatus, newStatus)
+					log.Printf("[INFO] OCSP status changed from %v to %v", oldStatus, newStatus)
 					err := OnChange()
 					if err != nil {
-						log.Printf("[ERROR] onchange after ocsp update: %v\n", err)
+						log.Printf("[ERROR] OnChange after OCSP update: %v", err)
 					}
 					break
 				}
@@ -75,7 +75,7 @@ func maintainAssets(configs []server.Config, stopChan chan struct{}) {
 // whatever is listening at 443 better proxy ACME requests to it.
 // Otherwise, the acme package will create its own listener on 443.
 func renewCertificates(configs []server.Config, useCustomPort bool) (int, []error) {
-	log.Print("[INFO] Processing certificate renewals...")
+	log.Printf("[INFO] Checking certificates for %d hosts", len(configs))
 	var errs []error
 	var n int
 
@@ -110,7 +110,7 @@ func renewCertificates(configs []server.Config, useCustomPort bool) (int, []erro
 
 		// Renew with two weeks or less remaining.
 		if daysLeft <= 14 {
-			log.Printf("[INFO] There are %d days left on the certificate of %s. Trying to renew now.", daysLeft, cfg.Host)
+			log.Printf("[INFO] Certificate for %s has %d days remaining; attempting renewal", cfg.Host, daysLeft)
 			var client *acme.Client
 			if useCustomPort {
 				client, err = newClientPort("", alternatePort) // email not used for renewal
@@ -170,7 +170,7 @@ func renewCertificates(configs []server.Config, useCustomPort bool) (int, []erro
 			n++
 		} else if daysLeft <= 30 {
 			// Warn on 30 days remaining. TODO: Just do this once...
-			log.Printf("[WARN] There are %d days left on the certificate for %s. Will renew when 14 days remain.\n", daysLeft, cfg.Host)
+			log.Printf("[WARNING] Certificate for %s has %d days remaining; will automatically renew when 14 days remain\n", cfg.Host, daysLeft)
 		}
 	}
 
diff --git a/caddy/restart.go b/caddy/restart.go
index 30f80ba6..4b52cdac 100644
--- a/caddy/restart.go
+++ b/caddy/restart.go
@@ -93,7 +93,7 @@ func Restart(newCaddyfile Input) error {
 	sigwpipe.Close() // close our copy of the write end of the pipe or we might be stuck
 	answer, err := ioutil.ReadAll(sigrpipe)
 	if err != nil || len(answer) == 0 {
-		log.Println("restart: child failed to initialize; changes not applied")
+		log.Println("[ERROR] Restart: child failed to initialize; changes not applied")
 		return errIncompleteRestart
 	}
 
diff --git a/caddy/setup/root.go b/caddy/setup/root.go
index c24b39fb..5100f696 100644
--- a/caddy/setup/root.go
+++ b/caddy/setup/root.go
@@ -22,7 +22,7 @@ func Root(c *Controller) (middleware.Middleware, error) {
 		if os.IsNotExist(err) {
 			// Allow this, because the folder might appear later.
 			// But make sure the user knows!
-			log.Printf("Warning: Root path does not exist: %s", c.Root)
+			log.Printf("[WARNING] Root path does not exist: %s", c.Root)
 		} else {
 			return nil, c.Errf("Unable to access root path '%s': %v", c.Root, err)
 		}
diff --git a/caddy/setup/tls.go b/caddy/setup/tls.go
index 649c2ecc..4e5f7f9d 100644
--- a/caddy/setup/tls.go
+++ b/caddy/setup/tls.go
@@ -13,7 +13,7 @@ import (
 func TLS(c *Controller) (middleware.Middleware, error) {
 	if c.Port == "http" {
 		c.TLS.Enabled = false
-		log.Printf("Warning: TLS disabled for %s://%s. To force TLS over the plaintext HTTP port, "+
+		log.Printf("[WARNING] TLS disabled for %s://%s. To force TLS over the plaintext HTTP port, "+
 			"specify port 80 explicitly (https://%s:80).", c.Port, c.Host, c.Host)
 	} else {
 		c.TLS.Enabled = true // they had a tls directive, so assume it's on unless we confirm otherwise later
diff --git a/caddy/sigtrap.go b/caddy/sigtrap.go
index b9cbec6a..78d2eecc 100644
--- a/caddy/sigtrap.go
+++ b/caddy/sigtrap.go
@@ -23,7 +23,7 @@ func init() {
 
 		if len(errs) > 0 {
 			for _, err := range errs {
-				log.Println(err)
+				log.Printf("[ERROR] Shutting down: %v", err)
 			}
 			exitCode = 1
 		}
diff --git a/caddy/sigtrap_posix.go b/caddy/sigtrap_posix.go
index 0a353b67..8f7aaade 100644
--- a/caddy/sigtrap_posix.go
+++ b/caddy/sigtrap_posix.go
@@ -42,7 +42,7 @@ func init() {
 
 			err := Restart(updatedCaddyfile)
 			if err != nil {
-				log.Println("error at restart:", err)
+				log.Printf("[ERROR] SIGUSR1: Restart returned: %v", err)
 			}
 		}
 	}()
diff --git a/dist/CHANGES.txt b/dist/CHANGES.txt
index 623c5cba..fee86d76 100644
--- a/dist/CHANGES.txt
+++ b/dist/CHANGES.txt
@@ -9,6 +9,7 @@ CHANGES
 - New -email flag to customize default email used for ACME transactions
 - New -ca flag to customize ACME CA server URL
 - New -revoke flag to revoke a certificate
+- New -log flag to enable process log
 - browse: Render filenames with multiple whitespace properly
 - markdown: Include Last-Modified header in response
 - startup, shutdown: Better Windows support
diff --git a/main.go b/main.go
index e2e6b552..818fef71 100644
--- a/main.go
+++ b/main.go
@@ -62,7 +62,7 @@ func main() {
 	case "":
 		log.SetOutput(ioutil.Discard)
 	default:
-		file, err := os.Create(logfile)
+		file, err := os.OpenFile(logfile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0644)
 		if err != nil {
 			log.Fatalf("Error opening log file: %v", err)
 		}
@@ -98,7 +98,7 @@ func main() {
 	err = caddy.Start(caddyfile)
 	if err != nil {
 		if caddy.IsRestart() {
-			log.Println("error starting servers:", err)
+			log.Printf("[ERROR] Upon starting %s: %v", appName, err)
 		} else {
 			mustLogFatal(err)
 		}
diff --git a/middleware/markdown/markdown.go b/middleware/markdown/markdown.go
index 3b3bc96e..9f14ca8d 100644
--- a/middleware/markdown/markdown.go
+++ b/middleware/markdown/markdown.go
@@ -122,7 +122,7 @@ func (md Markdown) ServeHTTP(w http.ResponseWriter, r *http.Request) (int, error
 				// if development is set, scan directory for file changes for links.
 				if cfg.Development {
 					if err := GenerateStatic(md, cfg); err != nil {
-						log.Println("On-demand generation error (markdown):", err)
+						log.Printf("[ERROR] markdown: on-demand site generation error: %v", err)
 					}
 				}
 
diff --git a/middleware/markdown/page.go b/middleware/markdown/page.go
index 3185d8ec..2b417d6e 100644
--- a/middleware/markdown/page.go
+++ b/middleware/markdown/page.go
@@ -92,7 +92,7 @@ func (l *linkGen) generateLinks(md Markdown, cfg *Config) bool {
 		l.Unlock()
 		return false
 	} else if err != nil {
-		log.Println("Hash error (markdown):", err)
+		log.Printf("[ERROR] markdown: Hash error: %v", err)
 	}
 
 	cfg.Links = []PageLink{}
diff --git a/middleware/markdown/process.go b/middleware/markdown/process.go
index dc4083b7..0a732477 100644
--- a/middleware/markdown/process.go
+++ b/middleware/markdown/process.go
@@ -115,10 +115,9 @@ func (md Markdown) processTemplate(c *Config, requestPath string, tmpl []byte, m
 
 	// generate static page
 	if err = md.generatePage(c, requestPath, b.Bytes()); err != nil {
-		// if static page generation fails,
-		// nothing fatal, only log the error.
-		// TODO: Report this non-fatal error, but don't log it here
-		log.Println("Rendering error (markdown):", err)
+		// if static page generation fails, nothing fatal, only log the error.
+		// TODO: Report (return) this non-fatal error, but don't log it here?
+		log.Println("[ERROR] markdown: Render:", err)
 	}
 
 	return b.Bytes(), nil
diff --git a/middleware/markdown/watcher.go b/middleware/markdown/watcher.go
index 0b39c741..fa5fb3ee 100644
--- a/middleware/markdown/watcher.go
+++ b/middleware/markdown/watcher.go
@@ -14,7 +14,7 @@ const DefaultInterval = time.Second * 60
 func Watch(md Markdown, c *Config, interval time.Duration) (stopChan chan struct{}) {
 	return TickerFunc(interval, func() {
 		if err := GenerateStatic(md, c); err != nil {
-			log.Println(err)
+			log.Printf("[ERROR] markdown: Re-generating static site: %v", err)
 		}
 	})
 }
diff --git a/server/server.go b/server/server.go
index d3a42076..5c97914d 100644
--- a/server/server.go
+++ b/server/server.go
@@ -266,8 +266,7 @@ func (s *Server) Stop() error {
 	err := s.listener.Close()
 	s.listenerMu.Unlock()
 	if err != nil {
-		// TODO: Better logging
-		log.Println(err)
+		log.Printf("[ERROR] Closing listener for %s: %v", s.Addr, err)
 	}
 
 	return err