"Smarter" has many different meanings. -> It could mean "more working memory", in which case games of various kinds are helpful. Anything that requires maintai

"Smarter" has many different meanings. -> It could mean "more working memory", in which case games of various kinds are helpful. Anything that requires maintaining a set of values or decisions in your head for a while: bridge & hearts (count cards) or poker, go (weiqi / baduk). -> It could mean "more mindful", i.e., being more observant and aware of yourself and your surroundings. A lot of people today claim that meditation is good for this. I find that not owning a smartphone is helpful. Reading a hefty dead-tree book can be a good antidote for "Goldfish Attention Span Syndrome". -> It could mean "better at reasoning", in which case some courses on philosophy would help (logic, epistemology). -> It could mean "more domain expertise", in which case you should spend some time taking courses or experimenting in some area of expertise. -> It could mean "broadening your experiences", in which case you should go out and start something completely new, preferably something which is a little bit intimidating. -> It could mean "being more healthy", because poor sleep habits, poor nutrition, and poverty all effectively lower IQ and general intelligence. Fix some things in your life, get more exercise, learn to cook / eat better. edit: get in touch with HN user tokenadult (https://news.ycombinator.com/user?id=tokenadult); https://news.ycombinator.com/user?id=tokenadult); he studies and works in the field of intelligence and education (and frequently writes very informative posts on the subject); I'm just a dabbler.