Even if you are desperate, don’t look desperate
Don’t call her after an hour after the breakup to ask her if she has enough “space”
Don’t “accidently” run into her in the hair salon
Don’t start asking her friends out
Don’t show up at her office unannounced
Don’t stop by her house either
Don’t try to get her to bed on your “first date” after the breakup
Don’t leave notes on her car; it is a type of low-grade-stalking. (If you sneak a gift or love note into her house, congrats, you have just went up a grade of being a stalker)
Don’t try to get over her head by talking to her parents, sisters or friends. Even if you are in close term with them before, she will sense that a gang-up is under way.
Don’t dramatically alter your appearance (shaving your head, pierce your nose, change your clothing style) that’s lamer than setting up a tent in front of her house.
That’s about the list of things we could come up with, if you have anything to add o it please feel free to do so.