Research your idea. See if there's a demand. A lot of people have great ideas, but they don't know if there's a need for it. You also have to research your competition.
Pol Pot - he rounded up anybody he thought was intellectual and had them executed. And how he told someone was intellectual or not was whether they wore glasses. If they're that clever, take them off when they see him coming!
I'm grateful to look the way I do. However, if I could change anything, I would like to be a bit bigger all over. Not much - just a bit.