Pmarca Guide to Personal Productivity (2007)

If you have at any point in your life lived a relatively structured existence — probably due to some kind of job with regular office hours, meetings, and the like — you will know that there is nothing more liberating than looking at your calendar and seeing nothing but free time for weeks ahead to work on the most important things in whatever order you want. And then at the end of the day, before you prepare tomorrow’s 3×5 card, take a look at today’s card and its Anti-Todo list and marvel at all the things you actually got done that day. I love this technique — being able to put more notches on my accomplishment belt, so to speak, by writing down things on my Anti-Todo list as I accomplish them throughout the day makes me feel marvelously productive and efficient.

Source: pmarchive.com