What can I do to change my personality if I know it is rather poor?

What aspect of character is worse ? This is very critical. For example, if you think you have a bad temper and get angry easily. Then learn to manage your emotions, tell yourself that impulse is the devil, learn to think twice before acting. You can practice writing, read books, cultivate your quiet character, and learn to enjoy solitude; if you feel that you are weak in character and have no perseverance. Then we must learn to insist on doing one thing, try to insist on 21 days, it will develop a habit. It is recommended to exercise more, to strengthen their physical fitness, you can go to the gym, sweat will be a relaxed, incomparable comfort, with a strong body will make their self-confidence doubled, more resistant to pressure. In fact, how to say, everyone's character more or less have their own problems. The owner does not need to be too concerned, no one is perfect. Can recognize their own problems has been very good. Proof that you will reflect on their own, as for how to live, that of course is to live well. Can change then change, can not change if it is not to affect others, live their own so what. Right? Don't be mediocre and worry about nothing. As the saying goes, character determines destiny, cultivate their own sound character is not an overnight thing, I hope you can stick to it, make up for their own shortcomings, become a better person.