Budgeting is nothing but a promise to yourself that you will not cross the lines that you define in your budget sheet. You can prepare your own budget. Though you can think out your own method, let me pen down what I have felt about budgeting.
Step1: Calculate total income per month considering all possible sources. Don't forget your family contribution. If you receive a lump sum aid, allot it to all the months of the academic year.
Step2: Calculate your monthly expenses. Here you should be selective.