In Some Thoughts on the Reading of Books Dr. Mohler offers six suggestions:
1. Maintain regular reading projects.
2. Work through major sections of Scripture.
3. Read all the titles written by some authors.
4. Get some big sets and read them through.
5. Allow yourself some fun reading, and learn how to enjoy reading by reading enjoyable books.
6. Write in your books; mark them up and make them yours.
I recommend checking out his blog post for his further elaborations on these suggestions.