3. Don’t complain.
Sure, work isn’t always fun. Yes, you might get stuck with assignments you don’t enjoy and you will most definitely have to work with some a-holes from time to time. It’s not about always being happy, it’s about how you handle the moments when you are unhappy that will define you as an employee. When times get tough do not complain to your coworkers, wait until you get home to blow off steam.