It’s not often we recommend a book, but this is useful one called Algorithms to Live By: The Computer Science of Human Decisions. It was written by Brian Christian and Tom Griffiths.
This book takes powerful lessons from computer science and explains how they can be useful for regular humans. I don’t want to ruin the book for you, but here are a few gems: 1) older people take longer to retrieve information from memory, not because they are getting senile, but because they have more stored, 2) piles are the most efficient way to store the paperwork on your desk, 3) there is an optimal time to search for an apartment or mate before taking the plunge. I am not giving the rest of the book away, but it is really interesting and insightful.