Confidence comes from hours and days and weeks and years of constant work and dedication.
Nothing good comes in life or athletics unless a lot of hard work has preceded the effort. Only temporary success is achieved by taking short cuts.
Football teaches you hard work. It takes a lot of unspectacular preparation to have spectacular results in both business and football.
I don't want to be complaining. Paul Zimmerman (a veteran writer) has mentioned that he thought there was a bias, but I don't want to say that because it can work against you and make it sound like these guys are whiners.
You can never give up-athletics taught me that. You must work hard, prepare, learn from your losses and continue to fight until the very end.