This should be especially helpful for people (like me) who don't have much experience. It's a series of several videos which covers checking pressure, as well as fixing a flat.

I find it amusing that the guy is wearing white pants. I can't do anything at all to my bike without getting smudges somewhere on me or my clothes.

http://www.ehow.com/video_2363042_ti...flat-tire.html

Pam