Success requires a persistent misreading of the odds.
You can't think your way out of a box; you've got to act.
Unless you walk out into the unknown, the odds of making a profound difference in your life are pretty low.
In the great city of San Francisco, where I used to live, at 2 in the morning every other Victorian house has somebody who is writing the great American novel. And the city is not loaded with James Joyces or Virginia Woolfs. But entrepreneurship is about distorted views of reality.
Give a lot, expect a lot, and if you don't get it, prune.
It doesn't matter what product or service you're offering; there is unlimited ability to improve the quality of anything.