If only everyone read Carl Sagan's The Demon-Haunted World: Science as a Candle in the Dark[0], or at least the Baloney Detection Kit part.
[0] https://www.amazon.com/Demon-Haunted-World-Science-Candle-Da...
[0] https://www.amazon.com/Demon-Haunted-World-Science-Candle-Da...
Every human should know about the potential fallacies of the mind, how to find truth, and how to be happy simply 'not believing' something (distinct from 'disbelieving') until you have evidence either way.
If there is any set of ideas that improved my life the most it's definitely these-- thanks to Sagan, Michael Shermer, James Randi and others, and no thanks to any of my high school or college professors.