There are several ways to create a budget, and everyone does it differently. Choose what will work best for you, whether it's online, on paper, in a spreadsheet or even on an app.
There are many budget tools online that will assist you in creating a budget. Mint.com can link to your bank account and categorize transactions. This can help create a budget structure and will show if you will make more money than you spend in a given month. CashCourse offers a Budget Wizard that creates a monthly budget based on your entered income and expenses.
There are a handful of mobile apps which allow detailed budgeting to be done right from your phone. Apps bring your bills and your income into one place, giving you a clear picture of your budget. The Mint: Budget, Bill, Finance app is a good example.
Using a program like Excel gives you control over how your budget is constructed and will does the math for you. Here is a sample spreadsheet budget that may be helpful.
Here is a Semester Budget you can download. This budget will help you prepare for a semester at a time.