Hard Resetting the iPhone
Last night I had to hard reset the iPhone because it froze / crash. I thought I'd put up a note about it primarily so that I don't forget, and because people may need to know how to do it, especially if you are not familiar with Macs and iPods.
Anyway, if you press the sleep button in the upper right of the iPhone, and the home button at the same time for about 10 seconds, the iPhone will reset. You will not lose your data.