SHIFT-Enter – Gives you a line feed as opposed to Enter which gives a carriage return. This is useful when you want a new line on a bulleted list (without it adding another bullet) or beginning a new line without ending a paragraph. A rough HTML analogue would be Enter=<p> where SHIFT-Enter=<br>
CTRL-ALT-PrintScreen – takes a screen shot of just that particular application. Great for browser screenshots. As a bonus you can now paste copied screenshots directly into a GMail message.
SHIFT-CTRL-V – pastes your text with formatting removed. This is particularly useful when copying text from web pages into e-mails where you don’t want to preempt the existing formatting. Unfortunately this shortcut doesn’t work in a lot of Microsoft programs.
Any letter inside of a folder – click inside of a folder and type any letter and the file starting with that letter will get selected
SHIFT-CTRL-T (in browser) – brings back tab you just closed