Don't Boil the Ocean: You can't be everything to everyone. Focus on a small, specific niche and dominate it. It's better to be a big fish in a small pond than a small fish in the ocean.
· Validate Before You Scale: Before ordering 10,000 units, try to sell 10. Before building a complex app, create a landing page describing it and see if people will give you their email address. This is called a Minimum Viable Product (MVP) .