Tips :

Most achievement and acceptance is about hard work. Sometimes we're not as willing to own up to ourselves that we still have more work to do before we're as polished as we need to be. Do be enthusiastic about your chances but also be realistic––if there is still some learning and experience needed, throw yourself into getting it sorted rather than pining over rejection.
Rejection is just a case of you finding out that a particular person or organization was not interested in you, whether it is about love, work or some other pursuit in life. This doesn't speak for the rest of the world, so do not fortune tell that everyone else will act like this.
Know that if you get rejected in love and relationships, there is always someone else out there and a soul mate for you.
Even if you get rejected for something and try again, know that you may still get rejected once again. Life isn't fair, but it's not life's circumstances which give you true happiness in the first place.
Seek professional help if you keep feeling depressed after rejection. Alcohol or drugs won't help.
Find a way to unwind after a rejection. Some people turn to their faith, others to a hot bath and meditation. Find ways to clear your mind, get over the bad feelings and restore your equilibrium.
If someone rejects you from love, it does not mean you should feel poorly of yourself or feel bad. It just means that they didn't feel the attraction. And you cannot force that.