Simply ignore the bitter person who has his own issues.

[mkrajnak]

Amen to that... you're the best.

[cedry123]

One thing that usually helps me is to remind myself that, now that the situation is over, I am done and can go on with my life but THAT person still has to live with themselves!

After a honk on the road or snotty words to me I go on and live my life. That person still is rapped in their bitter, angry, dark little world.

Just ask yourself, 'if I could trade paces with that person/exchange lives, would I want their bitter little existence? " usually I feel so much better about being me.

'Usually'