Books I highly recommend:

Productivity and self-improvement
  • Peak: Secrets from the New Science of Expertise
  • Think Like a Freak
  • Living with a SEAL
  • Resilience: Hard-Won Wisdom for Living a Better Life
Mental health
  • The Owner’s Manual for the Brain
Software engineering and programming
  • Design Data-Intensive Applications
  • The Well-Grounded Rubyist
  • The Pragmatic Programmer