ANDY'S ANSWER: No matter who you are or what job you have, there will always be days when it's tougher to find the positives in what you are doing. It would be nice to always be able to make a living at what you love, but the truth is that most people end up working for the money. So how to make work enjoyable, even if it isn't the job of your dreams?
Nothing gives you job satisfaction like a compliment from a customer or your boss, but sometimes you are the only one who appreciates what you do. The key is to find ways to be the best you can be at what you are doing, whether it's mowing grass, flipping burgers, or servicing customers. Even if your job is making widgets, you can challenge yourself to make your widget faster or better than you did before. If your job is dealing with the public, you should pride yourself in being able to answer any question a customer might ask, and to be able to serve them quickly and efficiently. Competing with yourself to continually improve keeps the job interesting and can have added benefits when customers and the boss do notice.
Even if what you're doing is temporary, by thinking of every job and finding something positive in it as a learning experience, you are developing something you can put in your life skills coffers. Those life skills will help you further your dreams, sometimes in ways that you can not even imagine right now, and no one can ever take that away from you. As Robert Conkilin said, "Dreams get you into the future and add excitement to the present."
Seeing your job as part of the path to your dreams will help you find ways to be enthusiastic about whatever you are doing.