Simple things should be simple and complex things should be possible.
I think I came up with this slogan at Parc during discussions wrt children, end-users, user-interfaces, and programming languages. Chuck Thacker (the genius behind the Parc hardware) also liked it and adopted it as a principle for many of his projects.
Alan Kay's answer at Quora.
Ask yourself this about your presentation: Would I be interested to hear it?Will I learn anything to my advantage?Does it answer my questions?Will I believe me?What is the most important thing I will remember from my presentation?
(Presentation)
Your target in presentation is : Make your audience to like youMake your audience to trust youMake your audience strongly feel about whatever you say
Even the most shy person can become pretty open when the topic suits their personality.
How to do presentation?