These days, I find a scanned copy someone made (usually hiding on a Chinese students’ university ftp site), bring it over to my phone, and have it read to me while I lay in bed. (there’s a nice PDF reading app I have on my iphone) I challenge myself by making the speed as fast as possible. Helps a little.
Once or twice I made a major production out of it. I had the computer read it to me in a Russian accent (for fun), and had the words appear on the screen like a teleprompter, scrolling by, with some interesting music in the background. I think engaging more of my senses made it easier to focus. But generally, when I read, I speed read / scan, look for what I need, and close it.