As any soldier will tell you, or anyone who survived the severe crisis, the most difficult part of any crisis is the psychological aspect. Staying mentally fit is of course good for your health in general, but also can help you make better decisions.
How to achieve real self-actualization? Each layer in the Maslow Pyramid can be achieved through understanding how to, based on information.
Information can provide the foundation of the pyramid, such as how to obtain high quality food (or what foods to avoid), water, sleep; and all the way up the pyramid, including security (which in our age, most important is digital security, as most of our lives are now digitized).