The most common budgeting method used is a blank piece of paper. We've all tried it at one time or another. Income is listed on one side, expenses on the other. The idea is to balance income against expenses so that, hopefully, there is still some money left at the end of the month. _ There are at least a couple major problems with this method. First, it's pretty easy to overlook quite a few expenses. Things like that daily stop at the coffee shop, or the cost of a car registration that happens only once a year.
After you have track your spending for a month, you now have the information you need to create a monthly budget. Now you know exactly how and what you spend your money on. If you did not have a surplus of money at the end of the month, you can now see area where you can trim your spending in order to operate you budget with a surplus next month.