I’m writing this in the hope that I can inspire more people to give their talks this kind of treatment. It’s not a zero amount of work—it takes me 2-3 hours any time I do this—but it greatly increases the longevity of the talk and ensures that the work I’ve already put into it provides maximum value, both to myself (giving talks is partly a selfish act!) and to the people I want to benefit from it.

• Pace
• Power (from your belly)
• Pause
• Depth
• Inflection (not AT people)

https://www.youtube.com/watch?v=lCufGjD1oQs

While it's really hard to immediately win over a crowd, as a speaker it's really easy to lose the room within the first minutes of your presentation.

To make sure you don't lose your audience I asked Boris Veldhuijzen van Zanten, accomplished speaker and founder of TwitterCounter and The Next Web, for some of the things you should never say during your presentations.