Nothing like an annoying coworker to push you to new heights. Sometimes the best motivator is not motivation itself, but annoyance. Have you ever used a person you didn’t want to be around as fuel for your fire? Maybe you’re holding a grudge, and it makes you want to perform better. Maybe it’s a rival, or maybe it’s a nemesis… whatever it is, you may despise them, but it’s part of what keeps you going.