The best chance of enjoying enhanced cognitive skills is to fall in love with ideas, or intelligent conversation, or intelligent books, or some intellectual pursuit. If I do that, I create within my own mind a stimulating mental environment that accompanies me wherever I go. Then I am relatively free of needing good luck to enjoy a rich cognitive environment. I have constant and instant access to a portable gymnasium that exercises the mind. Books and ideas and analyzing things are easier to transport than a basketball court. No one can keep me from using mental arithmetic so habitually that my arithmetical skills survive.

James Flynn, What Is Intelligence?: Beyond the Flynn Effect, Cambridge, 2007, p. 87