It's not my idea, it's Dr. Helen's:
The point is, learn to not only accept rejection, but to welcome it, it seems that it is the only way to overcome the irrational belief that the world owes you. It doesn't. Of course, one should fight injustice, but the irrational belief that the world should be nice to you just because you are you is a sure way to end up disappointed about life.
If you would like to try some of Ellis's techniques to reduce anxiety and gain a sense of mastery over your social reactions, try reading How to Make Yourself Happy and Remarkably Less Disturbable. At 93, his advice is still ahead of its time.