I've found budgeting software (I use the free Quicken program that came installed on my computer) to be quite helpful, especially since you can categorize your expenses and see where your money really goes.
If you don't want to invest in budgeting software, you can find helpful forms and such on the BudgetStretcher site at
http://homemoneyhelp.com (No not my site, but a very good site with lots of helpful information and forms).
Good Luck!