A business with low entry cost, high success rate, and enjoyable environment. In one word: Internet. Those who fail on the internet only do so because they are foolish businessman. A intelligent person can successful on the internet with common sense and lots of hard work.
The best business is the one - 1. Adds value to people's lives. 2. Makes their life easier. 3. Pays the employees well 4. Pays the owner 10000x more on his investment. What say?