Anger:

1. You must break the force of your anger with love. If you feel yourself becoming angry, make sure you do nothing unkind because of your anger. You must make a special effort to be kind to the very person you are angry with. Sweeten your anger with kindness. When you do this, you will be able to draw benefit from the Tzaddik and then you will be able to understand the true goal of all things. You will taste the delight of the World to Come, and you will see how everything in the world is part of the movement to this ultimate goal. Your perception will be according to the root which you have in the soul of the Tzaddik (18:2).
2. Through breaking the force of anger with love and kindness, the true Tzaddikim receive honor and greatness and the world finds a true leader, one who will have pity for the world and lead it in the right way, bringing each individual to his ultimate goal (Ibid.).
3. Anger and unkindness arise when people's understanding is limited. The deeper their understanding the more their anger disappears, and kindness, love and peace spread. This is why the study of Torah, which deepens the understanding, brings love and peace into the world and banishes anger (56:6).
4. Immersing in the mikveh is also an antidote to anger, because immersing in the mikveh brings understanding (Ibid. 7).
5. When a person gives way to anger, it stirs up the great accuser, Esau, or Edom. The accuser in the upper world is the source of a flurry of accusers and enemies who come down and take charge of this angry man. His anger puts his wisdom to flight, and the image of God disappears from his face. He no longer has the face of a man. This is why he is in the power of his enemies. Because he has the appearance of a beast they are not afraid of him (57:6).
6. The remedy for anger is to fast. In fact, the main value of fasting lies in this. That is why when a person is fasting the Evil One comes against him and creates all kinds of pretexts for making him angry. The Evil One wants to spoil the fast. One has to be very careful to avoid getting angry on a fast day. The whole value of the fast lies in subduing one's anger (Ibid.).
7. Through the holy act of eating on Shabbat, anger is crushed (Ibid.).
8. Anger can make a person lose his money. When a person gets angry he spoils the blessing of wealth which was due to come to him. He causes a stain upon his good name and, indeed, his very soul. But when a person holds his anger back and behaves patiently even in the most trying of circumstances, he attains wealth, a good name and an unblemished soul. All the other souls yearn to be merged with his soul and he can succeed in drawing many souls closer to God. Through this the glory of God is revealed (Ibid.).
9. When a person fights his anger and breaks it, the spirit of Mashiach is drawn into the world. Such a person is accounted as if it was through him that the world and all that is in it was created and brought into being. He will be worthy of rich blessings, and he will attain true prayer, directing himself to God alone without any extraneous motives of gaining people's respect and admiration. He will succeed in carrying out all the mitzvot and other holy acts that he must accomplish (66:3).
10. Through the sanctity of the Land of Israel it is possible to break the force of anger, depression and laziness completely. For this reason one must plead with God to be worthy of coming to the Land of Israel speedily. There a person can attain tranquility in the face of any experiences he may undergo. He will never be angry or upset with anyone, no matter what they may have done (Ibid. 155).