Though your advice on healthy habits and coffee to increase alertness is great, the 10% brain part is a myth. The myth arose in early 19th century from work of William James. What James wanted to say was an average person in his life achieve only 10% of his capacity. Not sure how it morphed onto 10% of the brain. Nonetheless, all your advice will still work in keeping a person mentally healthy and alert. So an upvote for that for sure.