Be human

Voltaire said that "Perfection is the enemy of the good." This is true when it comes to presentations and probably the biggest obstacle.

More than anything, your audience wants to connect with you as a person. To accomplish this:

1. Familiarise yourself with your presentation, but don't memorise it.
2. Practice just enough to feel confident that you know your structure, the major points, and overall flow.
3. If you make a mistake, don't apologise or act flustered; just collect yourself and continue.