Bored and misused - 2

I had a discussion with my manager today about this awful job that I've been assigned. He basically told me to keep working on it regardless. In other words, I've been overruled. Remember he's the boss, so I have to listen and do what he says. So I will, and he allows me to mix in other things to make my life a bit more palatable. He asked that I spend up to 20 hours a week on it. I'm not looking forward to continuing it. I'm not looking forward to going to work each day, but I've got vacation from Thursday to Monday which I am looking forward to now more than ever.