Carl Kruse : Some of the most successful businesses are the ones you’d never expect to succeed. But peel back the curtain and you’ll find even the most unique business ideas follow a proven formula for success. See how even regular people can find million dollar ideas that worked. When you’re trying to find the right idea for your business, sometimes all you need is a little inspiration. Let’s see what we can learn from two unique business ideas worth millions — and one worth billions.