Ask HN: How good is good enough to be successful?

I consider myself as a Jack of all trades, master of none.<p>As I go along learning and building stuff, I have to admit that none has turned out the way I wanted it to be - in terms of success (money, popularity,...).<p>Of course I learned new technologies but the implementation never feels as crisp as of other successful companies.<p>There is always so much you could do better, more beautiful and so on but as a one-man show you have limitations. You cannot be the master of design and programing.<p>I would like to ask HN: What kind of tool-set do you need to be successful in the tech world? How good is good enough?