“Admittedly, not everyone has access to the types of sophisticated training regimens that Michael Posner and Torkel Klingberg use to help folks strengthen their cognitive horsepower. The good news is that you can flex your working-memory in several different ways. Playing action video games, for example, can improve your brainpower. That’s right, spending several hours a week playing games like Grand Theft Auto, Half-Life, or Halo improves core cognitive abilities that extend well beyond the computer screen.”