Reading over Mark Cuban's wisdom-packed little book, How to Win at the Sport of Business: If I Can Do It, You Can Do It, I was inspired by a chapter where he talks about failure and success.
Cuban says that failure is a natural part of getting to success, and, that without failure we could never advance. He also points out very thoughtfully that, although we most likely will know failure ourselves from time to time, we do not necessarily need to be the ones failing: we can learn from the mistakes of people around us and the mistakes of those from the past.
Once you have learned from enough mistakes, Cuban suggests, you will reach success, and that those failures will have no weight in the end anyway:
"All that matters in business is that you get it right once."
So if you're concerned because you haven't "made it" or whatever, what I take from this is that at some major level, success is a numbers game. I mean, he's basically saying that if we haven't succeeded at achieving whatever it is we may be after, it's because we haven't learned enough from failure. And, in business specifically, once you've achieved a one-big-success, nobody's gonna remember all your mistakes.
[It kind of reminds me of Ms. Frizzle's "take chances, make mistakes, get messy" mindset.]
Do stuff, make mistakes, read about the mistakes of the past, keep experimenting and learning and you will grow!