Tim Ferriss calls himself the human guinea pig. In his pursuit of constant self-improvement, he even undertook a muscle biopsy with a scalpel, cutting down his leg. In his keynote, he explains how to become world class master at any skill. The essential ingredient is to never stop questioning the obvious – you can even reverse the learning steps, which sometimes can be extremely beneficial. He demonstrates on himself that there is no such thing as being bad at languages – but there are bad methods of learning. And what is the worst time to learn a new skill? Watch the video to find out.