Some reading rules by Ryan Holiday that I like.

• Err on the side of age. Classics are classics for a reason.
• Bring a pen with you too. Reading is better if you’re taking notes
• Beat them up. Books are not precious things.
• The whole point of reading is to really understand something. If all you’re after is the ‘gist,’ skip books and stick with blog posts.
• Don’t just read books, re-read books. There’s a great line the Stoics loved—that we never step in the same river twice. The books don’t change, but you do.
• Embrace serendipity. So many of my favorite books are just random things I grabbed at bookstores
• “If we encounter a man of rare intellect, we should ask him what books he reads.”
• "Don’t be satisfied just getting the ‘gist’ of things," is what Marcus Aurelius learned from his philosophy teacher Rusticus.
• When intelligent people read, they ask themselves a simple question: What do I plan to do with this information?
• Look for wisdom, not facts. We’re not reading to just find random pieces of information. What’s the point of that? We’re reading to accumulate a mass of true wisdom—that you can turn to and apply in your actual life.