There is some good advice for developing a book-reading habit in this Farnam Street post.
— Read 25 pages per day. This is a minimum. Odds are you will end up reading more than 25 pages on a lot of days because you get on a roll. 25 pages a day is about 8,500 pages in a year. If the average book is about 250 pages, that is 34 books per year.
— Don’t worry about what you are supposed to read. They don’t have to be 1,000 page books or classics that were written a century ago. Read books that look interesting to you now, and then let your interests expand organically over time.
— If you are dreading a return to the same book for another 25 pages because it is not as captivating as you expected, move on to a new one. You can always come back to it later if you want to give it another shot. The more important goal is developing the daily reading habit.
Source: Shane Parrish at Farnam Street: