It's a stark reality that millions of us face once the holiday season is over: the post-holiday slump. Even just a few days off can make coming back to the office seem excruciating-there's all that work to do, the anticipation and cheer of the holidays are gone, and for many people the next vacation day is a long way off. Yes, being a working adult is tough, but getting over the post-holiday slump doesn't have to be with these tips: