Your office sweetheart has hours of expense reports to fill out, and as it turns out, you've been gifted with a stunning ability to fill out hundreds of reports in less than five minutes. Unless you're known for helping out everyone with their expense reports, don't do your boyfriend or girlfriend's. The quickest way to turn all of your coworkers against you is to provide special treatment to your significant other, and some coworkers may be hyper-sensitive to displays of favoritism. Don't answer for your significant other in meetings or take on his or her battles with the boss. You didn't magically become a work team when you went on your first date, so fight the urge to help out on something that should be your significant other's responsibility.