If you don't mind getting it from a Christian perspective, Larry Burkett's "Financial Guide for Young Couples" is excellent (even if you aren't married or dating).

If you ever plan to be financially independent, it's important to live on a budget (unless you are like some of the folks around here that seem to make more than they can spend.) I resisted it for the first few years, but have found that the longer I do it that there is great freedom in living in the boundaries you've set for yourself.