Here’s a list of fears from The Creative Habit by Twyla Tharp:

1. People will laugh at me.  Not the people you respect. 

2. I have nothing to say. An irrelevant fear.  We all have something to say. 

3. Someone has done it before. It’s all been done before.  Get over yourself. 

4. It’ll never be as good as it is in my head.  Better to build imperfect domes in Florence than cathedrals in the clouds.