Agree - Daniel Kahneman's Thinking Fast & Slow is a good book that addresses the topic. Understanding how the brain works a bit really helped me to get "in the

Agree - Daniel Kahneman's Thinking Fast & Slow is a good book that addresses the topic. Understanding how the brain works a bit really helped me to get "in the zone" a lot more often and I have certainly seen gains in focus/concentration (which translates into learning/ability) because of it.