Finally, the best outside investor is always another successful entrepreneur. They have been where you're going, they know all about dreaming and understand control. They also make the best directors. Next to family, other entrepreneurs are your best shot. Just remember, percentages don't mean anything.
Control means everything.
To keep control, you'll have to be clever and creative. So be prepared. If you wait until you need money, you'll pay a hell of a price. Every entrepreneur should start raising money the day he has an idea and then keep raising money. That's what being an entrepreneur is all about.