Dave Asprey, the Bulletproof Executive, claims that his IQ was raised 30 points by taking creatine and going through Dual N-Back training exercises. While I'm suspicious of the 30 point claim (seriously?!), I'm quite sure there's some merit to his proposition that the combination of the two can be a very potent cognitive booster. I myself have written about the merits of creatine and N-Back training in the past, though I haven't tried the latter. Perhaps it's time I did.