How do you deal with things like negative thoughts? I find I am an 'ideas' guy, but will instantly shoot myself in the foot by researching similar services that do better than a one-man-team could do. I also have severe trouble dedicating myself to a complete-project - even if I push past the first issue mentioned above - and will really battle my inner demons who think supplying an MVP is 'good enough'.

I suppose my question is how you fight your mental battles.