Did you ever want to get even with somebody by putting them in your book? Don’t waste your time. 

I always regret it when I create a character because I have a beef with someone or because there’s somebody who is so appalling or frustrating that I just have to write about them. They always end up looking cartoonish or pointless. You can’t put a person in a story for your own gratification alone, which totally blows the idea of getting even with anybody through your writing.

Bummer, huh? So here’s your bottom line: if it doesn’t SERVE THE STORY, it shouldn’t be in there.