Put time aside for reading like you would for anything else; say, 3-4 hours should be enough to get through a decent novel. If you read in transit, on the toilet, and then a bit in time set aside for reading, you can easily read a book a day -- which is what I tend to do with the Kindle when I have a backlog of books I want to read.

If your reading speed isn't up to par, just set aside an hour or two a day to read; the more you read, the faster you'll get over time. I used to read several books a week when I was a kid, and that amount really helped contribute to my reading speeds today, I think. :)