Keep your computer awake!

I love showing my friends YouTube videos when they come to my place, but I hate shaking that mouse to keep the screen from dimming. Sometimes in protest I turn the screen/power saving off, but then I forget to turn them back on. Headache!!!
So I finally got sick of this and installed a slick little program called Caffeine. It's a menu bar app that keeps your computer awake. Download it, drag it into your Applications folder, then double click it to run it.

One click fills the cup and keeps your computer awake...
...and one click turns it off and allows your computer to use the screen/power saver.
Super simple, and it works. Awesomeness.

I only wish that I could decaffeinate myself that easily...