One of the best ways I've found to read more books, is to get rid of the self-imposed plight to finish every book you pick up, and the plight to read every part of it.
If a book is boring, stop reading it and pick up another book. If a chapter is uninteresting to you, just skim through it or skip it.
The world will not end. Nobody will be angry at you.
I wonder where the self-imposed pressure to finish a book comes from. From school book reading assignments? Or is it that we feel that finishing a book is supposed to be a struggle, an accomplishment to deserve?
I don't know. But I know that since I stopped finishing bad books I've started to enjoy reading more, and I'm also finishing more books.
Usually I give every book a chance. I read at least an hour. But honestly, life is too short to read bad books. And there is a shitload of bad books out there.