Creating a budget starts with tracking your expenses. You can use a spreadsheet, a notebook, or a budgeting app to write down all of your income and expenses. Make sure to include all of your fixed expenses, like rent or mortgage payments, and all of your variable expenses, like groceries and entertainment. Once you have a complete picture of your finances, you can start creating a budget. Set a target for your monthly spending in each category and stick to it as closely as possible. Remember to include some wiggle room for unexpected expenses. Review your budget regularly and adjust it as necessary.