Now, you can add chanting to your brain training regimen.

Your mind doesn't run parallel tasks, it has to trade off one focus for another. The good news is that mindfulness meditation can hone your attention span, and reduce stress and anxiety.

Do you get antsy when there's nothing to do?

Amy Herman teaches visual intelligence to doctors, intelligence analysts and the NYPD. Here she runs through how to make decisions you can defend under questioning: ones that are perceptive and informed.