No, the b-word is not the equivalent of a female dog or something you say at the end of "you son of a . . . "
The b-word I'm referring to is BUDGET.
Having, and maintaining, a budget will help you keep track of all your expenses. There are many resources of how to put together a budget. Here are two such resources where you can find budgeting forms to use:
Dave Ramsey (this is the one we use)
About.com's Frugal Living