Wrong choice Made

First off, sorry for the long hiatus. Will surely try and kick this habit out.

Jumping right in, what do you when you realize you made a wrong choice. (Of course, its always a choice. Life always gives you a choice and it depends on what you choose.)

No, I am not talking about what would you do to come back to normalcy. You got a question in March and you failed. You get the same question in September. What will you do?

The answer to my first question (in bold) lies in what you learnt between March and September.

Side Note: Go make those wrong choices as long as you are learning. They are probably your best teachers.