7. Expect the unexpected. Every business plan needs some wiggle room to allow for unexpected changes. Part of this involves creating budgets and marketing plans with some built-in flexibility; but adapting to change also requires you to accept that you might have to modify or even abandon business practices that worked well in the past.
8. Don't forget what makes you unique. A cookie-cutter business plan might help you get started, but it won't help you succeed. And while it helps to look at your competitors, don't model your business after them. After all, you're in business to beat the competition. Learn from your competitors' strengths, but also learn how to spot their weaknesses and use them to improve your own business plan.