Today I offer you my personal rules for entrepreneurship. This set is by no means complete, but they are hopefully food for thought.

Rule 1: Entrepreneurship is about action – The Captain’s chair is yours.

Rule 2: Some people dream about doing great things. Keep your eyes wide open and your feet on the ground, and then do great things.

Rule 3: A sports metaphor for Rule 2. There is no crying in baseball. There is no sleeping in entrepreneurship.

Rule 4: Focus on customers and building a business that is client centered rather than focused on technology. Make sure your company solves customer pain or creates great results for your customer.

Rule 5: Entrepreneurship is not fair. Neither is angel or venture capital funding.

Rule 6: Treat your 3F (Friends, Family and others (known as Fools) round as if they are professional investors. All 3F angel investors have an investment committee – their spouse. Respect the relationship.

Rule 7: Angel and venture capital is like a series of locked doors. Someone must unlock the door for you. Find the people with keys.

Rule 8: Build your company by building a customer base. Build for one client at a time. Later, build for multiple clients.

Rule 9: You have exactly one minute to make your pitch. Practice making them.

Rule 10: Learn the language of entrepreneurship and tell the truth. (Do not tell the typical lies: “Our market cap will scale up to $27.1 billion in five years” or “our competition is too big and slow to move as fast as us,” unless you are Elon Musk and build spaceships in your spare time.)

Rule 11: Get a champion who will work with you.

Rule 12: Bootstrap. Frugality is a virtue. Put some skin in the game.

Rule 13: You are only as good as your cash.

Rule 14: So what? Why you? What have you accomplished so far?

Rule 15: Build a team. One person cannot do everything.

Rule 16: Be a good listener and a better filter.

Rule 17: Network!

Rule 18: If you build it they will not come. You must sell to them.

Rule 19: Never BS yourself or your team. Always pause to understand the bias in all decision making.

Rule 20: This rulebook is incomplete.

Do you have additional tips for entrepreneurs? Feel free to add to the list.