what makes a good presentation

Without exception, all good presenters have one thing in common, enthusiasm, both for their subject and for the business of presenting it. Enthusiasm is infectious. Audiences can't help but be affected by it. And the best public speakers always make what they say sound as if it really matters. They know that if it matters to them, it will be matter to their audience.

Many things contribute to the success of a presentation - new and unusual content, a clear, structure, a good sense of timing, imaginative use og visual aids, the ability to make people laugh and think. But above and beyond all these in enthusiasm. What kind of language and what kind of techniques will best show your enthusiasm for your subject?