diff --git a/helper.zsh b/helper.zsh
index 1df159a..cf28d07 100644
--- a/helper.zsh
+++ b/helper.zsh
@@ -19,7 +19,7 @@ TRAP_SIGNALS=(
 # Adds a function to a list to be called when a trap is triggered.
 function add-zsh-trap() {
   if (( $# < 2 )); then
-    print "Usage: $0 type function"
+    print "usage: $0 type function"
     return 1
   fi
 
diff --git a/init.zsh b/init.zsh
index 20d38ab..46545ae 100644
--- a/init.zsh
+++ b/init.zsh
@@ -3,7 +3,7 @@
 # Check for the minimum supported version.
 min_zsh_version='4.3.10'
 if ! autoload -Uz is-at-least || ! is-at-least "$min_zsh_version"; then
-  print "omz: The minimum supported Zsh version is $min_zsh_version."
+  print "omz: too old shell version detected, minimum required: $min_zsh_version"
 fi
 unset min_zsh_version
 
diff --git a/plugins/archive/functions/extract b/plugins/archive/functions/extract
index 2271fab..40fe5cf 100644
--- a/plugins/archive/functions/extract
+++ b/plugins/archive/functions/extract
@@ -4,12 +4,14 @@ local file_name
 local extract_dir
 
 if (( $# == 0 )); then
-  print "Usage: extract [-option] [file ...]"
-  print
-  print "Options:"
-  print "    -r, --remove    Remove archive."
-  print
-  print "Report bugs to <sorin.ionescu@gmail.com>."
+  cat >&2 <<EOF
+usage: $0 [-option] [file ...]
+
+options:
+    -r, --remove    remove archive
+
+Report bugs to <sorin.ionescu@gmail.com>.
+EOF
 fi
 
 remove_archive=1
@@ -20,7 +22,7 @@ fi
 
 while (( $# > 0 )); do
   if [[ ! -f "$1" ]]; then
-    print "extract: '$1' is not a valid file" 1>&2
+    print "$0: file not valid: $1" >&2
     shift
     continue
   fi
@@ -56,7 +58,7 @@ while (( $# > 0 )); do
       cd ..
     ;;
     (*)
-      print "extract: '$1' cannot be extracted" 1>&2
+      print "$0: cannot extract: $1" >&2
       success=1
     ;;
   esac
diff --git a/plugins/archive/functions/ls-archive b/plugins/archive/functions/ls-archive
index 589b245..2e8cdc5 100644
--- a/plugins/archive/functions/ls-archive
+++ b/plugins/archive/functions/ls-archive
@@ -1,12 +1,14 @@
 local verbose
 
 if (( $# == 0 )); then
-  print "Usage: extract [-option] [file ...]"
-  print
-  print "Options:"
-  print "    -v, --verbose    Verbose archive listing."
-  print
-  print "Report bugs to <sorin.ionescu@gmail.com>."
+  cat >&2 <<EOF
+usage: $0 [-option] [file ...]
+
+options:
+    -v, --verbose    verbose archive listing
+
+Report bugs to <sorin.ionescu@gmail.com>.
+EOF
 fi
 
 if [[ "$1" == "-v" ]] || [[ "$1" == "--verbose" ]]; then
@@ -16,7 +18,7 @@ fi
 
 while (( $# > 0 )); do
   if [[ ! -f "$1" ]]; then
-    print "extract: '$1' is not a valid file" 1>&2
+    print "$0: file not valid: $1" >&2
     shift
     continue
   fi
@@ -35,7 +37,7 @@ while (( $# > 0 )); do
     (*.rar) unrar ${${verbose:+v}:-l} "$1" ;;
     (*.7z) 7za l "$1" ;;
     (*)
-      print "ls-archive: '$1' cannot be listed" 1>&2
+			print "$0: cannot list: $1" >&2
       success=1
     ;;
   esac
diff --git a/plugins/git/functions/git-hub b/plugins/git/functions/git-hub
index e9d18ae..2ef84ee 100644
--- a/plugins/git/functions/git-hub
+++ b/plugins/git/functions/git-hub
@@ -30,11 +30,11 @@ if [[ -n "$url" ]]; then
     "$BROWSER" "$url"
     return 0
   else
-    print "fatal: Browser not set or set to a non-existent browser." >&2
+    print "$0: browser not set or set to a non-existent browser" >&2
     return 1
   fi
 else
-  print "fatal: Not a Git repository or origin remote not set." >&2
+  print "$0: not a Git repository or remote origin not set" >&2
   return 1
 fi
 
diff --git a/plugins/git/functions/git-info b/plugins/git/functions/git-info
index e3069c8..0d2f931 100644
--- a/plugins/git/functions/git-info
+++ b/plugins/git/functions/git-info
@@ -64,7 +64,7 @@ function _git-info-abort() {
     return 1
   fi
 
-  cat > /dev/stderr <<END
+  cat >&2 <<EOF
 
 
 Gathering status for certain repositories is time intensive.
@@ -74,7 +74,7 @@ for this repository.
 To revert, execute:
   git-info on
 
-END
+EOF
 
   unset _git_info_executing
   git config --bool prompt.showinfo false
@@ -156,7 +156,7 @@ function git-info() {
     elif [[ "$1" == [Oo][Ff][Ff] ]]; then
       git config --bool prompt.showinfo false
     else
-      print "Usage: $0 [ on | off ]"
+      print "usage: $0 [ on | off ]" >&2
     fi
     return 0
   fi
diff --git a/plugins/history-substring-search/history-substring-search.zsh b/plugins/history-substring-search/history-substring-search.zsh
index 8577130..980c74f 100644
--- a/plugins/history-substring-search/history-substring-search.zsh
+++ b/plugins/history-substring-search/history-substring-search.zsh
@@ -149,7 +149,7 @@ if [[ $+functions[_zsh_highlight] -eq 0 ]]; then
   {
     # Load Zsh module zsh/zleparameter, needed to override user defined widgets.
     zmodload zsh/zleparameter 2>/dev/null || {
-      print 'zsh-syntax-highlighting: failed loading zsh/zleparameter.' >&2
+      print 'history-substring-search: failed loading: zsh/zleparameter' >&2
       return 1
     }
 
@@ -176,7 +176,7 @@ if [[ $+functions[_zsh_highlight] -eq 0 ]]; then
                        zle -N $cur_widget _zsh_highlight_widget_$cur_widget";;
 
         # Default: unhandled case.
-        *) print "zsh-syntax-highlighting: unhandled ZLE widget '$cur_widget'" >&2 ;;
+        *) print "history-substring-search: unhandled ZLE widget: $cur_widget" >&2 ;;
       esac
     done
   }
diff --git a/plugins/perl/functions/pgs b/plugins/perl/functions/pgs
index 99a375c..bff559e 100644
--- a/plugins/perl/functions/pgs
+++ b/plugins/perl/functions/pgs
@@ -1,6 +1,6 @@
 # Perl Global Substitution
 if (( $# < 2 )); then
-  print "Usage: $0 find replace [file ...]" >&2
+  print "usage: $0 find replace [file ...]" >&2
   return 1
 fi
 
diff --git a/plugins/perl/functions/prep b/plugins/perl/functions/prep
index ef9118e..4832629 100644
--- a/plugins/perl/functions/prep
+++ b/plugins/perl/functions/prep
@@ -1,6 +1,6 @@
 # Perl grep since 'grep -P' is terrible.
 if (( $# < 1 )) ; then
-  print "Usage: $0 pattern [file ...]" >&2
+  print "usage: $0 pattern [file ...]" >&2
   return 1
 fi
 
diff --git a/plugins/wakeonlan/functions/wake b/plugins/wakeonlan/functions/wake
index 83410c7..c4cba48 100644
--- a/plugins/wakeonlan/functions/wake
+++ b/plugins/wakeonlan/functions/wake
@@ -1,11 +1,11 @@
 local config_file="$HOME/.wakeonlan/$1"
 if [[ ! -f "$config_file" ]]; then
-  print "$0: $1: There is no such device file." >&2
+  print "$0: no such device file: $1" >&2
   return 1
 fi
 
 if (( ! $+commands[wakeonlan] )); then
-  print "$0: Can't find wakeonlan. Is it installed?" >&2
+  print "$0: command not found: wakeonlan" >&2
   return 1
 fi