Measure when, and how badly, brain fog is affecting you. Compare that with your daily activity to understand what helps to clear away the fog.
Measure how work affects your brain performance to know when you have more to give, and when it's time to take a break.
Measure how sleep affects your brain performance to understand what factors in your life are important for you to achieve a more rejuvenating sleep.
Measure how your rehabilitative efforts are affecting your brain performance to find the most effective path to recovery.
Measure how lifestyle changes affect your brain performance to discover a healthier, more intelligent, more connected life.