The book presents a simple, but flexible, system, which is actually a mindfulness practice. Have all the important data in one place. Don't forget important events. Write things down before you do them to mitigate impulsive decisions (I'm a master of those). Set goals for the day/month, and define priorities (goals, not obligations!).

Reflect on the past to notice patterns. Only once you notice something you don't like, you can take action on it. This is the most important part of the system, in my opinion. In addition, it also makes you notice things you did well, a very important practice.

In the old days, you used to depend on interruptions. Now interruptions depend on you. 💪