Holy Prophet Muhammad (saw) and Anger management skills and techniques in Islam

The behaviour of a courageous person is based on wisdom and serenity
of soul. He gets angry on proper occasion and is patient and
restrained. His anger is to the proper extent and if he takes revenge,
it is with reason and discretion. He knows well as to whom he should
forgive and what to overlook and ignore.
The anger of a true believer is for the sake of Allah (SWT). In the
state of anger, he keeps in mind his duties, rights of creatures and
never oppresses anyone. He neither makes the use of indecent language
nor acts indiscreetly. All his acts are based on rational
considerations and are in accordance with the norms of justice and
Divine laws. He always acts in a way that he will not regret his
actions later on.
Hence a true believer practices self-control and suppresses the
motives of ill-temper through taking enough time before saying or
doing anything.
Anger (Ghadab), Bad Temper and Human Vice according to Prophetic
Sayings (Hadith)
Holy Prophet Muhammad (saw) said: "The best Jihad is self-control."
Holy Prophet Muhammad (saw) said: "He is not strong and powerful, who
throws people down, but he is strong who withholds himself from
anger." Therefore, Anger is the sign of weakness not a sign of
strength.
Holy Prophet Muhammad (saw) said: "Whoever suppresses his anger, when
he has in his power to show it, Allah (SWT) will give him a great
reward."
Holy Prophet Muhammad (saw) said: "Anger corrupts faith in the same
way that vinegar destroys honey."
Imam Jafar Sadiq (as) narrated on the authority of his father Imam
Muhammad al-Baqir (as) that, a Bedouin came to Holy Prophet Muhammad
(saw) and said: "I live in the desert; hence, I want you to instruct
me the comprehensive of speech." Holy Prophet Muhammad (saw) said: "I
instruct you not to be angry." As the Bedouin repeated the same
request three times, Holy Prophet Muhammad (saw) repeated the answer
three times. Then Bedouin commented: "I will not ask you for anything
any more. Certainly, Holy Prophet Muhammad (saw) has instructed me the
best."
Imam Ali (as) said: "The most powerful person is the one who is
victorious over his anger with his forbearance."
Imam Ali (as) said: "When a person gets angry, if he is standing, he
should immediately lie down (sit down) on earth for a while as this
removes the filth of Shaitan (Satan) from him at that time."
Imam Ali (as) said: "Keep off anger because it is one large army from
the Shaitan's (Satan) armies."
Imam Muhammad al-Baqir (as) said: "Any one who suppresses his anger,
Allah (SWT) will add to his honour and authority in this world and the
world to come."
Imam Muhammad al-Baqir (as) said: "A man often becomes so angry that
he is never pleased until this causes him to be in Hell."
Imam Jafar Sadiq (as) said: "One who refrains his anger (towards
someone), Allah (SWT) will cover his secrets."
Imam Jafar Sadiq (as)said: "Anger is the key (that opens the door) to
all kinds of vices."
Imam Jafar Sadiq (as) said: "A Mu'min (believer) is the person who
when angered, his anger doesn't lead him away from that which is
true."
Imam Jafar Sadiq (as) said: "He who has no control over his anger has
no control over his reason."