It starts with tracking your life and obligations. However, if you choose to track or write down your obligations the better. We want as least friction and distraction as possible. If someone says an event is happing on this date. You need a system to record that event and date it with ease. An just as easily retrieve that data and see it on a regular base. "If you want to master a habit, the key is to start with repetition, not perfection. You don’t need to map out every feature of a new habit. You just need to practice it." - James Clear