A few months ago when I first got my start up going, it was the thoughts of a successful acquisition or of building a profitable company that kept me awake at nights programming. But now that the company is starting to get going and I'm signing up users, I find myself more driven by the fear of failure than anything else. I'm terrified that if it doesn't work those that supported me in this venture will think I'm crazy when another idea pops in my head (and it undoubtedly will). Anyone feeling the same way and if so which do you feel is a better motivator?