There is no one giant step that does it. If you have made mistakes, even serious ones, there is always another chance for you. A failure is not always a mistake, it may simply be the best one can do under the circumstances. The time for action is now. But to look back all the time is boring.
Successful men keep moving.
The successful man will profit from his mistakes and try again in a different way. Neither will being in the right place at the right time, unless you are ready. Both tears and sweat are salty, but they render a different result. The superior man blames himself. When I was born and where and how I have lived is unimportant.