Begin forcing yourself to read 100 (or if you're feeling the time constraints these days, 50, 25) pages a day of something. Or, you know, 10 pages a day of several somethings. You'll go a week, look back, and suddenly have finished a book or two. It's a wonderful feeling. Your day will start to feel incomplete without some reading. You'll stop wasting so much time (you may think you're busy -- and probably you are, somewhat, but I'm not sure how busy anyone can truly be in high school when compared to college/grad school) ... e.g. how long did you facebook today. Etc. Remember the thread about not immediately opening your computer when you get home from school/work? I usually clean my kitchen, but sometimes I pick up a book. Worked for me, and while I'm not quite still reading 100 a day, I'm reading much more than I was before I tried that little experiment. I largely regained my ability to sit and read.