I'm not saying this will work for you, but this has always worked for me in the past.
Go to the library, or somewhere that is suited for studying. (I'va also been known to pull up a table to a comfortable chair at a starbucks). Make sure you're comfortable and just get to it. I also find that having my cd player on, or the radio or something in the background can help break the mundane silence of the library, but don't get something that's too distracting.
Don't try to read everything right away. Pace yourself by reading sections at a time and then taking a break, otherwise your mind will wander off and you won't get anything out of it. Schedule breaks just to get your mind on something else for a bit, but don't schedule them on time, make them after you get so much of the work done.
My undergraduate was in math so this was particularly important. WORK EVERY PROBLEM MULTIPLE TIMES! Practice definitely makes perfect.
Hope this helps you and good luck.