Extremely Useful Computer Tricks

• Quick UndoI use this very very liberally and find it to be one of the most useful key presses ever. This works for almost everything and I should have really put this in the top section but it seems to have snuck down here for some reason! Hold down the Ctrl key and press Z to undo anything you just did. This works for an absolute ton of programs which includes every single office program.
• Quick Redo
  The sibling of the above key press. This one is useful if you undid something by accident. Ctrl and Y is the key press for this one!