There will always be coworkers who grate your nerves, drop the ball, or assume the role of your office’s “Instigating Ingrid.” Sometimes it seems like the key to professional success isn’t dedication or hard work, but learning how to deal with those difficult coworkers with a smile on your face. Here are some words of wisdom for when it comes to preventing difficult coworkers from raining on your parade: 1. Focus on self-control. It’s impossible to control another person’s attitude or actions. Read more.