http://www.daveramsey.com. Read his books, his strict followers call it gospel. HEHE ... but it's helped me a lot get back on track with finances.
Basically he calls for you to stop using credit cards, only use cash, and at the start of each month write on paper where ALL of your money is going to go. Account for every last cent and don't spend any money unless you have budgeted for it ahead of time. (still working on that one and the cash only).