Creating a cash flow budget requires gathering your financial information, such as bank statements, bills, receipts, invoices, pay stubs, and tax returns. You should then choose a time period for your budget, like a month, quarter, or year. Additionally, you can break down the budget into smaller periods like weeks or days. Subsequently, list your income sources and amounts and your expenses categories and amounts. Finally, subtract your total expenses from your total income to get your net cash flow. If the net cash flow is positive, you can save or invest the surplus. On the other hand, if it's negative, you need to find ways to reduce spending or increase income.