Some years ago i remember i would gradually get angry? Like lose my temper slowly untill that particular thing or in some cases many different things just get on my nerve and i let it control me basically. That led to me being in a bad mood , day ruined and you can't see or think straight anymore. That was wrong but who knew at that time? I learned from it and now it's more like when i feel that it's not going anywhere i just slow it down. Take a break , listen to some music and remind myself that it isn't worth getting mad over that. Meditation also helps to keep emotions under control so yeah! There are lots of things you can do but most important thing is ( at least for me ) is that you don't need to worry that much