There is a list I came across on imaoneandonly dot org (check it out) on how to feel good about yourself. I’ll quote some here that I personally utilized and found helpful.
Challenge yourself! Push yourself higher and harder. The sense of accomplishment you get when you achieve goals that once seemed so far away is indescribable.
These won’t make you in a better mood now (it’s okay, I wasn’t expecting a prize) but will definitely make you happier in the long-run.