A key rule of thumb is to test as much as possible before officially launching. Market research can be tricky—asking people “Would you come if I opened an Italian restaurant here?” doesn’t always give reliable answers. But for certain types of businesses, especially low-cost ones like cleaning services, you can start small and validate demand right away. Go out, find a few clients, and talk directly to potential customers. Many businesses allow you to do this kind of groundwork, reducing risk before you fully commit to launching.