http://www.sott.net/articles/show/216086-Mental-muscle-six-ways-to-boost-your-brain http://www.sott.net/articles/show/216086-Mental-muscle-six-w... the above t

http://www.sott.net/articles/show/216086-Mental-muscle-six-ways-to-boost-your-brain http://www.sott.net/articles/show/216086-Mental-muscle-six-w... the above talks about TDCS, but also meditation, bright lights, playing music. Good read