Chill out. Some days it can feel like everything is going wrong, and that work is conspiring to drive you mad. Stay positive and it should all blow over. If that proves difficult, take some time out. You don't want to turn into Charlie Chaplin's Little Tramp, for whom life on the factory line really proves too much.
Remember the positives in your job. Every role has its up-sides, it's just that they are sometimes masked by other less savoury factors. Remember that other people would perhaps kill to be in your position - take this interview with The Onion, in which a detective moans that a career spent liaising with the spirit world is not all it's cracked up to be.
Have fun in the office. If you can successfully make the work environment both efficient and amusing, it goes a long way to keeping everyone happy. Just remember the boundaries - what's funny to you may appear devilish to others. In Big Train, a chief executive has to deal with a particularly devilish employee.