Actually pretty good advice. The Pundit is a Road Warrior. In flight wifi is only decent if you purchase it by the month and your business pays for it.
One thing they don’s discuss is sleep.
Travel is like shift work. Learn to use Melatonin and other sleep aids. Learn how many hours of sleep you MUST have to function. Learn that sleep comes in 90 minute cycles.
Learn how to use ear plugs.Learn how to use eye masks.