Revisiting books helps you to catch some stuff you missed the first time around.

The problems we deal with change over time so it's more likely that new passages and ideas will be relevant to you.

Re-reading books is a good way for ideas to be repeated and be remembered too. 

A book is a knowledge tree with a few fundamental concepts forming the trunk and the details forming the branches.

Retain more of what you read by "linking branches" and integrating your current book with other books you've previously read.

Connections like ...

The best way to figure out what you've learned from a book is to write something about it.

Using Feynman's note-taking technique, write the name of the book at the top of a blank sheet of paper, then write down how you'd explain this book to a beginner. 

Some qu...

If we only read one book on a topic and use that as a basis for our beliefs for an entire category of life, we won't have an accurate and complete knowledge about them. 

To overcome this problem is to read a variety of books on the same topic. 

Dig in from different ...

To retain more of what you read, putting ideas into action is one of the best ways to secure them in your mind.

Choose a book that's practical so that you can apply the lessons taught, in real-life situations.

For example, if you're starting a business, reading a...