There is also an alternative to GTD, it is Zen to Done (http://zenhabits.net/zen-to-done-ztd-the-ultimate-simple-productivity-system/ http://zenhabits.net/zen-t

There is also an alternative to GTD, it is Zen to Done (http://zenhabits.net/zen-to-done-ztd-the-ultimate-simple-productivity-system/ http://zenhabits.net/zen-to-done-ztd-the-ultimate-simple-pro...). It basically tries to be a simplification of GTD. Also the idea is to focus on 10 simple habits to improve productivity.