Be As Natural As Possible.

Strive to make your presentation or speech as natural as possible. Don't put on any acts  reminiscent of the old circuit preachers with their cultivated tones and thunderous voices. Keep your presentation simple. You don't want your voice to sound stiff or artificial.

 The key is to be yourself speaking to that close friend. Some of us are more precise and careful in our speech. Some of us normally speak in a more casual manner. Either style is fine although always keep your audience and material in mind. Sometimes you might have to make your presentation a little more formal than you normally would -- other times a little more casual.

 Whatever you do  just don't put on any airs or special tones -- or be  -- overly  precise. Speak distinctly with proper pronunciation -- but don't over do it.

 

Of course don't go to the other extreme either.  Speaking in a natural manner does not mean resorting to jargon, or slang, or poor grammar or being overly casual.

 And if your audience  is made up largely of members of a certain culture that expect you to follow certain protocols when speaking to strangers then make sure you  learn and follow these in your presentation. But even in situations like this with the proper use of  volume, tone, and wording combined with appropriate smiles and other body language you can still create a natural friendly atmosphere when presenting your ideas.

Just remember -- natural is conversational and strive for this.