Man is a generalist. No harm in that: he/she is remarkably adept at adapting and to enhance this process has created a batch of tools which allows him/her to perform to the highest levels.
When push comes to shove, what are the essential Tools of Excellence?
14: The Steel Water Bottle
Proper hydration allows clearer thinking. Hunger is often disguised thirst. Keeping water at hand is an excellent habit for sipping throughout the day and slurping between intervals and dead-lifts at the gym. But those plastic bottles picked up at the supermarket? Money you could spend on fruit and plastic best not dumped in a land-fill. Get a steel bottle. It doesn't take many weeks of use to have achieved payback over plastic, the taste is better and filled from the tap, it's cheap.
The Excellence Kit-Bag so far:
7: Trail-Mix
10: The Compass
11: The Wall Planner
12: Two Short, Intersecting Lines.
Bonus: How To be Brilliant.