Do you ever get annoyed because your Mac screen turns off regardless of your screensaver or timeout/security preferences? Well, I do. There are a few times when I want to keep the screen on because when it blanks out and password locks it causes my proxy or other apps to somehow jam or disconnect.
I found the perfect solution for those moments when you simply want the screen to stay on. Caffeine by Lighthead. A free app at that. It has super simple functionality accessible from the menu bar in the form of a little coffee cup. When the cup is steaming, your screen is perma-on for the time you set in your preferences. You can set the steam to another duration time by right-clicking and selecting a different time.
Get it at the Mac App Store for free