Try it.

Do something that you hate from the bottom of your heart, pit of your lungs and bile of your intestine. And you'll hate yourself for doing it. Curse yourself and the world for existing. Froth on the mouth and feel miserable for the day. Promise yourself never to let yourself go through such punishment. But after sometime you would have realised that you have just accomplished something that you didn't have the heart to do. What an achievment. And the next time you're made to do it again, you would do it without going through the pain you did while doing it the first time. So come to think of it you have just killed two birds with one stone. First you have managed to do something that you thought you were better off avoiding and secondly if circumstances prevail over you to do the same thing again you would most probably go through anguish of lesser degree. Which means you have learned to master that fear that you were hard-pressed not to admit. Right? So on a day when you are feeling miserable and when you think that you'll be better off if the sky were to come crashing down on you, do something you hate doing from the bottom-of-your-heart. So that what you did will override the bad hair day and you'll end up feeling better in some little corner.