This amazingly handy geek tip comes from GeekSugar community member Lauren:
I am one of those people that can't fall asleep if there is dead silence; I need a little noise. At home I use my dock with my iPhone and set the sleep timer, but for the holidays, I don't want to make room in my suitcase for my dock. Don't worry, Apple has thought of everything with a sleep timer built into the phone.
Find out how to turn on your iPhone's sleep timer after the break!
To start using it, just click your "Clock" App and "Timer" tab. Decide how long the phone should stay on, click on "When Timer Ends," select the top option, which is "Sleep iPod," then click "Start". The timer will shut off both your iTunes or Pandora app, so you can get to sleep without your dock too!
If you don't know, now you know! Got any geek tips of your own? Share the love in our iPhone Tips group, BlackBerry Tips group, or even our How-To Help Group!