During the first 15 years of my career, I thought that the key to entrepreneurship was the quality of the idea. I was wrong. Good ideas are easy. Even great ideas are easy. The idea is not the key to entrepreneurship.
Implementation is the key, and furthermore, the key to implementation is building a great team.
Anyone can come up with good ideas all day long. There you go. Have at it. Fourth, don't be paranoid. If you have an idea, share it, talk about it, and solicit feedback about it.