I struggle to find motivation to study as well, so I know the feeling. Sometimes it helps to play soothing, soft music (no lyrics) to help you concentrate. You could also try using the "reward system" - study for however many minutes, and then reward yourself with a video game session afterwards. I like to take the minutes I study and multiply them by 3 (i.e. - 10 minutes of study time = 30 minutes of computer time), but that's just me.

These methods haven't quite worked for me yet, but they work for a lot of other people so maybe they'll work for you.