The most important thing to remember when warding off flesh-craving zombies is a positive outlook on life.
Rather than simply saying, “My gosh, I do believe a flesh-craving zombie is gnawing on my arm!”, one should state: “Oh, thank you, dear flesh-craving zombie! I’m so happy that I’ve finally been allowed to join your less than alive posse!”

Secondly, sarcasm is an excellent tool. “My gosh, do you think you could moan any louder?” Will likely stop said zombie in its tracks.

Lastly, remember that due to zombies nocturnal feeding habits, they’re not exactly famous for getting lots of sleep, so keep a few bars of a lullaby on hand.