Keep your voice lower than theirs in an argument. Volume rarely wins anything. It just escalates.

Loudness is contagious, and matching it means you are both now climbing. Nothing in the disagreement changes except how hard it becomes to come back down. Staying under the other person’s volume breaks that loop, and it leaves you able to think, which shouting makes genuinely harder.

Pick the next argument you can see coming and decide in advance to stay quieter than whoever you are talking to. Not silent, not cold, just lower. You will notice them drop to meet you more often than you expect, and you will remember the conversation better afterwards.