There are many options to keep your brain active even as you age. Doctors recommend proper nutrition and moderate exercise (as a rule). But I have always been attracted to alternative methods. There are good life hacks in psychology. I used the
sherlocks mind palace method. Everything would be more complicated if you had to try to master the technique based only on book instructions. But modern online applications have made the process much easier. There is an opinion that training in a playful and interactive form helps improve memory much faster than classical methods. Just try it.