One of the things I do that I think might be an encouragement to other avid readers is to read multiple books at once, in small doses!
I'll read anywhere between three and nine books at any time, only one chapter at a sitting, that way I get the most out of each chapter.
Right now I'm reading 'Promise of the Spirit' a compilation of lectures by Charles Finney, along with some John Owen, AW Tozer and CS Lewis.
The topics of the books overlap a lot, and the way that I keep them seperate in my mind is to take notes on what I've read and to try to remember one important thing about what i've just read.
For example, from Finney, I remember that I just read the first lecture on the Promises of God. The AW Tozer was on the Wisdom of God and the CS Lewis was on Faith (I really loved his illustration about asking a father for money to buy him a birthday present...).
I say this, because before I would try to sit and read a book cover to cover in one sitting... which is possible if it's something like Brother Andrew's 'God's Smuggler' or a Corrie Ten Boom book... but when I did it with something like Andrew Murray or EM Bounds, I found later that I couldn't remember anything in particular about what I'd read... besides the fact that I'd read it!
I guess what I'm trying to say is, enjoy what you're reading, read in order to get the most out of it, don't push yourself just to get to the last page!
One thing I do is to make myself read a chapter of something I don't necessarily want to read every day before something I do... Although I love John Owen, it's not always the easiest reading... So in order to read KP Yohannan, I force myself to read at least one chapter of John Owen and take at least three notes.
I hope God blesses you reading =)