Our life is our time and attention; it is important to take advantage of them. And as energy follows thought, it is important to have clear desires and goals.

Capture everything that has your attention
Clarify exactly what it means.
Organize it in a system.
Reflect on it in a consistent manner and keep it updated

What do I do now? Make decisions based on the following project actions.
Every commitment that you have with yourself at any level, you need to externalize it out of your psyche and get to clarify exactly what it means to you, to what results you have committed and the actions you must take to move it towards closure.

Organize the results of that thought into appropriate categories into some kind of external trust system that you can review in a regular and objective manner, and then trust your judgments and intuition about the next action you should do now.
-David Allen

To do this step by step in a practical way, my manual can help you.