Mark Cuban is a serial entrepreneur, investor, and owner of the Dallas Mavericks. In his book, How to Win at the Sport of Business: If I Can Do It, You Can Do It, Mark talks about 12 rules a startup Founder should adhere to.
I agree with almost 10 of them. But the one that I cannot agree to anything lesser than 1000% is Rule 4:
Traction solves almost all the problems.