Shortcuts & gestures you can't live without

What are some gestures or shortcuts you use on a daily basis that you can't live without?

I've found the BetterTouchTool preference pane add on to be great for creating custom gestures on a per app or universal basis

Solution 1:

Sleep all displays:

ctrl+⇧+⏏

Solution 2:

Capture Screen shot:

⌘+⇧+3 (captures entire screen immediately)

⌘+⇧+4 (draw a rectangle to capture)

⌘+⇧+4, then space (click a window to capture)

Add ctrl to any of the above to copy to clipboard, rather than saving a PNG to the Desktop.

Solution 3:

Do it and don't ever tell the victim how to undo:

ctrl+⌥+⌘+8 (only until Lion) (spoilers)

Couldn't possibly live without it, above all. It was fun while it was default... :-(

So, I'll add a handful of spoilers below on how it could still be done.

Unfortunately it now comes disabled. To re-enable it, find Keyboard Shortcuts Accessibility.

Or, after OS X 7, it won't be as smooth (even if you do practice positioning the mouse):

⌥+⌘+F5 then select Invert Display colors (apple article)

Solution 4:

Seems like a silly question for Stack Exchange, but here goes. And I'll be more realistic than most folks.

• Two finger scroll
• ⌘+Q (quits app)
• ⌘+W (closes document/window)
• space for Quick Look in Finder
• space for play/pause in most media players
• ⌘+C (copy)
• ⌘+V (paste)