This may sound like a drag, but it's good to get into the habit of doing it every day. Create your own study space. If you don't have a desk in your room, or if the dining room table doesn't give you enough peace, consider going to the local library or taking up a corner of the basement. Don't do other things while you are studying. This includes watching TV, fixing a snack, and talking on the phone.
Some people claim they can study better with music playing.
That's a matter of personal preference. If it's just quiet background music that doesn't make you want to play the drums on your books, it's probably not too distracting. If you have a lot of reading to do to prepare for a test, try taking notes as you go along. Otherwise, you'll find your mind wandering. Homework shouldn't take up all of your spare time.