Stop playing if you get as worked up as I used to, its just pathetic.
Throwing your chips at people because of a bad beat, feeling unlucky because your AA got busted so you're just jamming mid hands, etc etc.
Nowadays, I got that fairly under control, I might spew for a hand or two if I'm really aggravated, just being honest.
You're going to have to emotionally mature and reflect on yourself a bit, AKA grow up a bit, and control that overly competitive nature (my biggest issue, I am stubborn and I hate losing in general).
Self reflection alone is a tough one for many, to be honest. It's gonna take time, and working on yourself is much harder then improving a poker game.