This. Cortisol is the enemy, so anything you can do to bring down the cortisol will help decrease that tired feeling after 8 hours of work. That means doing thr

This. Cortisol is the enemy, so anything you can do to bring down the cortisol will help decrease that tired feeling after 8 hours of work. That means doing three things programmers aren't well known for: eating well ("close to the farm" as my grandfather put it), exercising and sleeping at night. Vitamin C and Omega-3 are supplements that supposedly help with reducing cortisol in the short term.