Master the keyboard shortcuts in your most-used programs and you'll reap significant time savings. ShortcutFoo is an online training program that teaches you the keyboard commands in many applications including Gmail, Photoshop, Microsoft Visual Studio, Vim, the command line and more.
ShortcutFoo is similar to KeyRocket (formerly known as Efficiency), except ShortcutFoo is a dedicated training program whereas KeyRocket teaches you MS Office, Windows Explorer and Gmail shortcuts as you use those programs. ShortcutFoo is kind of like a school for learning shortcuts.
ShortcutFoo offers two learning modes, practice and drill. In the practice mode, the webapp prompts you for the shortcut and reveals the answer after a delay; it's great for learning new shortcuts and, well, practicing them. (Shortcuts are all about muscle memory.) Drill mode is similar, except there are no shortcut hints and your progress is recorded for each one-minute drill.
You can try ShortcutFoo out now under a guest account or register to save your progress. For a one-time fee of $US8.95, you can upgrade your account to unlock unlimited shortcuts and bundles of shortcuts. (The free Gmail bundles, for example, include beginner actions, navigation, and selection shortcuts. Upgraded accounts get more actions and navigation bundles, as well as application shortcuts.)
Go get your ShortcutFoo on and start working faster.