Index: src/main/java/org/apache/maven/cli/MavenCli.java
===================================================================
--- src/main/java/org/apache/maven/cli/MavenCli.java	(revision 629483)
+++ src/main/java/org/apache/maven/cli/MavenCli.java	(working copy)
@@ -892,6 +892,17 @@
 
             HelpFormatter formatter = new HelpFormatter();
             formatter.printHelp( "mvn [options] [<goal(s)>] [<phase(s)>]", "\nOptions:", options, "\n" );
+            
+            StringBuffer message = new StringBuffer();
+            message.append('\n')
+                   .append("Further help:\n")
+                   .append("mvn help:describe -Dplugin=<plugin>\n")
+                   .append("   help on a particular plugin\n\n")
+                   .append("mvn help:describe -Dplugin=<plugin> -Dmojo=<goal>\n")
+                   .append("   help on a particular goal within a plugin\n\n")
+                   .append("mvn help:describe -Dplugin=<plugin> -Dmojo=<goal> -Dfull\n")
+                   .append("   lots of details on a particular goal\n");
+            System.out.print(message.toString());
         }
     }
 }