In a perfect world, everyone with the passion, skill, and willingness to work hard would have his or her dream job -- and a dream salary to match. Reality, of course, is often quite different. But there's a world of difference between making less than you want (or even less than you're worth) and making nothing at all. And yet, for people in the arts, this is often the pitch: work for nothing, hoping that exposure or another project for your portfolio will lead you to real, paying work down the road. The question, of course, is whether or not it's ever worth it to do so. After all, you can't pay the rent with exposure.