What do you wish you started learning 10 years earlier?

Nutrition and fitness (actually biology and physiology). Especially keto/carnivore WOE and intermittent fasting. Tens of problems I thought it was me were just the poorly way I've been eating all my life.

    - Learning how to learn (Barbara Oakley).
    - Keeping track of my reading
    - Journaling
    - Jim Rohn's philosophy (any book, or 7 Strategies For Wealth)
    - Osho's philosophy (any book)

Mantaining/Building relationships, time management, self care

Biology, math, physics, paychology

film editing, math, and coding

Chinese.

Computers.