Odds are after 3 books you probably have more strategies than you need. Get a subscription to a weekly journal of your choice to keep up on the world economy. Then figure out what area of the economy you are interested in and focus your investment energy there.
And after that, make sure you give yourself enough time to develop another hobby. I have had too many trips with pilots that want to spend every free second talking about all the stuff he learned from Dave Ramsey. Even investment bankers know their jobs are boring and people would rather here about their boat than their bond market strategy.