When stuck in traffic, try not to panic.
Turn on your hazard lights. It's not like it'll make a difference, but it'll make you feel better.
Take deep breaths. In through your nose, out through your mouth. Repeat as necessary.
Don't honk your horn. You're not impressing anyone with your anger.
Consider taking a detour through a nearby cul-de-sac. It's like a free obstacle course!