GTD Lists: +8

There are many parts of Getting Things Done. Some I find more useful than others. The one I have found most useful is making TODO lists and reviewing them periodically. This also supports Allen's goal to get things out of your head and onto paper or into a computer document.

I don't follow a lot of his principles on exactly how to organize or when to review the lists, but simply making them and reviewing them has been a real life changer for me over the last 10 years or so.