Sometimes, with leaders, the stakes are very high indeed. Churchill, in WWII, for example, could not afford to utter publicly his concerns about England's ability to survive Hitler's onslaught. He thought about them, but the leadership conversation sometimes needs to inspire, not voice doubt.

You can strengthen your leadership voice by finding what I call its Maximum Resonance Point and learning to pitch your voice there. That gives you the strongest voice and thus the one that people are most likely to want to follow.

The key is to become aware of how you are signaling your presence in meetings, conversations, speeches - everywhere you show up. Then you can take charge of them.

Emotions are charismatic. Focused emotions are very charismatic. To lead people with charisma, you need to take charge of and focus your emotions.

Indeed, we learn far more from our mistakes than our successes.

The whole reason to study (and learn to control) body language is to have that support (rather than undercut) your message.

A language like Ruby is a toolbox with some really neat little tools that do their job really nicely. JavaScript is a leather sheath with a really really sharp knife inside. That knife can cut anything, and with it you can do anything. You can kill a bear. You can catch fish. You can whittle a piece of wood into a pony. It's even a toothpick.