First of all you need to know how much money you earn, for some people this is easy you look at your Wθ form and there it is, but for seasonal workers, small business people, it gets a little more complicated than that. If you receive income from a lot of different sources for a realistic value of what you actually earn itemize them, put them down on paper. Include all income, now is not the time to be hide money from the IRS you are just fooling yourself, you need to have factual figures here of your true income otherwise you will actually think you're in good financial shape because you know you got this extra income somewhere, but that's not always true.
You have to start somewhere and a budgeting worksheet can make the dreaded task of budgeting much easier. Whether you use computer based software or plan to keep your budget on paper, a worksheet can help you to brainstorm the categories you will need to budget for. While most of them will be slightly different than the budget you eventually come up with, they can serve as a helpful tool that will make the entire process much easie