It's perhaps the most terrifying situation an entrepreneur can face: Suddenly, the bank account is nearly empty. You can't pay your staff. You can barely keep the lights on. What now? This is what Saima Khan faced with her high-end cooking company Hampstead Kitchen. She charges a small fortune to cook intimate dinners for industry titans, celebrities, and even world leaders—but then a change in the tax law nearly wiped her out, and forced her to reconsider exactly what kind of business she was running.