I've shared my own system for remembering what I read over at The Sweet Setup. For the holiday season, I wrote a series of three posts that cover how you can put Day One to use as a digital commonplace book.
The purpose here is to put all your reading, web content, e-books, or paper books, into one place in order to review what you’ve read. It’s not a system for implementing what you read into your life. But it’s the resource you would use if you have a process for doing that type of thing.