Start with the business model
Before writing long sections, clarify how the business makes money, who the customers are, what problem is being solved, and why the offer is competitive.
Explain the market realistically
A useful business plan does not need exaggerated market claims. It should show the target customer, local competition, pricing logic, and how the business will reach buyers.
Include practical financial assumptions
Revenue, expenses, working capital, and break-even assumptions should be clear enough for the owner, lender, or investor to understand the logic behind the numbers.