What do you need to do to keep from having outbursts of anger?

Classes in anger management could do the trick. Over the long term, yoga and meditation will make you more patient and calmer in general.

Tole on some Top Shelf Bud.  Zookies is an excellent strain at the present. You will get Total Anger Management with minimal loss of focus while using the Zookies Strain. Has a very tasty flavor as well. I'm an angry person and this has helped me tremendously.

I keep myself busy or exercise to not ruminate on what triggered my bad mood.

Ephesians 4:30-32 

And grieve not the holy Spirit of God, whereby ye are sealed unto the day of redemption. [31] Let all bitterness, and wrath, and anger, and clamour, and evil speaking, be put away from you, with all malice: [32] And be kind one to another, tenderhearted, forgiving one another, even as God for Christ's sake has forgiven you.

Intelligence and self-control.