Every time before I start homework, I take a shower, get into my robe, brew some tea (decaf of course), and start some peppy music.
I have a feeling that by the time high school season starts, this routine, if I can find the time for it, which I sure hope I can, will be about the only thing that keeps me from beating my brains out on my desk.
It makes it seems so much nicer to do homework.
I suggest you listen to The Beatles Obladi Oblada. That is a song that just makes me optimistic from just listening to it.