Same here! I literally can't study without getting bored or drifting off. I try listening to some music while your studying, try with un-distracting music, preferably Clair De Lune (trust me it's really relaxing even though it sounds a bit too classical). Also, try and make your notes stand out with colours and buy stationary to keep you motivated. What keeps my motivation up is looking at Studyblrs on Tumblr, Try to literally understand the topic instead of cramming it all in your brain, try linking the ideas of the topic. Also, buy post-its and stick them wherever you stay the most (preferably your bedroom) - don't forget to write notes on them obviously.