Probably the best thing to do right now is to do genotyping, for example at 23andme, and determine the nutrition you need to grow old in a healthy way. See e.g. [1].<p>Also probably a good idea is to store mesenchymal stem cells in a bank, which could turn out to be useful later in life [2]<p>[1] <a href="https://www.nutrahacker.com/" rel="nofollow">https://www.nutrahacker.com/</a><p>[2] <a href="https://news.ycombinator.com/item?id=11829994" rel="nofollow">https://news.ycombinator.com/item?id=11829994</a>
I wonder whether reading a ton helps; I have the suspicion that it does. Alan Kay sounds extremely sharp for his age, as does Don Knuth, and pretty much most intellectuals.<p>But I still would want to know what's the best activity to keep the mind sharp. Chess grandmasters show a decline at about 35 if I recall correctly. I suspect that programming ability will also show a steep decline, but I wonder how big.<p>I'll keep an eye on Torvalds and Carmack because I don't think they'll give up programming as they get older.
tl;dr version:<p>For seeing tiny electronic parts despite nearsightedness, get a desktop or head-mounted magnifier.<p>For soldering despite hand tremors, support your forearms, work on upper body strength, and get a fume extractor to maintain high oxygen levels.<p>For general cognitive skills, do mental exercise.