Things you all do to keep yourself and other teammates off tilt?

I'm talking about small exercises, breathing deeply, listening to some white noise or something. Because i've been trying to improve my attitude on a new account but i've been acting toxic in a few games (even if it was just really being blunt, it was still mean), and while i've succeeded a few times in actually keeping people from dc'ing it wears on me still and I eventually start throwing insults or telling people they're retarded in chat.

Thank you!