Though I'm not a recent grad anymore, I've been asking these kind of question for awhile. Even though this article is from a few months ago, it's sound financial advice for adults in their early 20s.
Read it up!
All in all, it's a lot easier to save money if you adopt a lifestyle a few notches below your earnings capacity. If you try it the other way around - spending all you make (or more) right out of the gate - then saving will require painful cutbacks from the lifestyle you've gotten used to. And the sad truth is, many people never make that adjustment.