Let Me Google That For You is a real awesome way of telling people not to bother you with dumb questions that they could ask google. Just type in a question, get the link, and e-mail it to them. It will show them how easy it is to search for things in google, instead of asking you.
Here's an example scenario:
I'm hard at work, in the zone, writing my thesis. I have my headphone's on and am completely focused. Then, somebody comes and taps my shoulder. I take off my headphones.
"Hey Mike, How do start a new paragraph in LaTeX?"
I'm not sure. I google it. The command is "\". I've lost my train of focus, and it'll probably take me 30 mins to get it back.
-- OR --
I can say "Let me send you a link" and I send them an email that says "Here are some Instructions." They click it, and hopefully get the passive-aggressive message that they could have just googled their question right from the get go.
It's important to use this tool wisely, because sometimes people don't like a smart-ass. If you're trying to win points with your advisor, or a cute girl, use this with discretion.