This post by Megan McArdle doesn't at first glance appear to fall in the category of self-development and yet I feel it's worth sharing for her basic advice.
The important thing is to pay yourself first. Savings should be the first thing you do, not the last. After you've saved, then you budget your consumption. I won't tell you what to cut, because when you confront your new, slightly leaner budget, you'll be perfectly able to calculate what's no longer worth the money to you. I think you'll be pleasantly surprised to find that after a few weeks or a few months of initial pinch, you won't remember that you miss the money much.