Learn to accept Failure
You are the sum total of everything that has happened in your life.....the successes, the failures, the achievements and the mistakes. Not everything works out the way we want it to. So as long as you have tried that's all you can do. If you were take any of the disappointing outcomes away, then you wouldn't be your magnificent self!
Learn to celebrate your flaws and imperfections as an important and vital part of you. Stop wanting to be perfect - instead aim to be the very best version of you. This new attitude will make you a lot more fun to be around - give it a try!