This is important to me, because I have a lot of trouble finishing books. I'll read a few chapters, but then some other book in the room will catch my eye, and I'll switch.
Once I realized this, I decided to put "Mind and the World Order" on my nightstand, and then removed all other books from the room. Now the rest of my books are on another floor of the house; when I am in my bedroom (where most of my reading work is done) there is nothing else around to read but the book I'm trying to finish. It's worked out very well, as I'll be finished with MWO in a few days or so.