Find Those Keyboard Shortcuts
Keyboard shortcuts (or hotkeys) are a great way to add a little efficiency to your computer use. But when you can't remember what those keys are, "Was that ⌃⌘F3 or ⌥⌘F3?", the efficiency gained is lost. Adding to the issue is that most apps have their own set of shortcuts (outside the standard ones, like ⌘C for Edit > Copy, etc.) So do you just rummage through the menus looking for the shortcut to press?
CheatSheet is a great little utility from Media Atelier that shows a list of shortcuts for the active application when you press and hold the Command key down. Not only does it show the shortcuts, but you can click on the item and execute it without having to remember where it was.