My friend Scott Bourne wrote a great post on getting started in photography. It is a must read for anyone who doesn't consider themselves a photography pro.
My favorite from the list is
"5. Don’t try to learn everything all at once. You don’t have to become an expert photographer, post-processor and printer all in the same week."
You can read the whole list here – http://photofocus.com/2012/01/19/10-of-the-things-beginners-should-know-about-photography/