What are /r/NavalRavikant's favorite Products & Services?

From 3.5 billion Reddit comments

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I like brilliant.org cause they teach you the core principle by giving you problems to solve, its very visual, which I like cause everything that reminds me of school, gives you flashbacks. They send you riddles via email as well so its easy to integrate in day to day life.

yo I literally just stumbled upon this book this morning. Seems like what you're looking for :)
https://www.amazon.com.au/Almanack-Naval-Ravikant-Wealth-Happiness/dp/1544514212/ref=tmm_pap_swatch_0?_encoding=UTF8&qid=&sr=#customerReviews