A list of your income and expenses, no matter how complete, is not a spending plan, but is the information you need to create a spending plan. And, a paycheck_by_paycheck spending plan will help ensure the success of, or at least help prevent the failure of your budget.
For example, most people have no real idea of how much money they actually spend on food but when you create and maintain a budget, not only will your awareness rise, but much of the time your bank account will flourish as well. That's because most people find various ways of cutting corners once they realize how much they are truly spending. Instead of thinking a budget will end an era of eating out and renting videos, think of the incredible vacation you can have by limiting the activities you engage in now. In addition, many people on a budget find that they can engage in the same amount of activities they did before the budget only now they look for sales and eat out at places that are more budget friendly.