I am a very upbeat person and tend to try to keep my students on the optimistic side of things. When they start to complain about how much home work they have, I remind them that in x-amount of weeks it will be all over, and they will be that much closer to graduation and into their careers. I also remind them that without practicing by doing homework, they might not retain the knowledge necessary to compete for their jobs. Some students appreciate this motivation, others find me too "cheery" I have trouble finding a mid-point.