[WheelsAtLarge]

I think most reader have this problem. The problem is that most of us just read and hope the information sticks. The trick is to not just read but to immediately recall and reflect on what you read. You also need to write down a summary of what you read. Yes, this will slow down the amount of books you read but you will retain much more.

[underthensun]

Yep. Read, write down, try to connect as much things as possible to make easier to retrieve it later

[gashaw]

This is probably the best (and most effortul) way to aquire the knowledge initialy. I did it a lot back in school, then few months upto a year later I would forget most of the material all the same.