There are always two steps to giving a presentation, and because of that there are two steps in which poor choices are made. The first is always going to be the organizational phase. The organizational phase is when all the information for a presentation is gathered, sorted and processed into a presentation. The number one mistake here is that it is done too late. Procrastinating until the night before the presentation can be hard not to do, but even giving yourself an extra day can help improve the presentation dramatically. No one willingly gives a presentation when they don't believe in their constructing presentation skills, but a lot of people are forced to in their everyday lives. Sometimes these presentations are required through school or work or some other event, but most people do have to give one sometime in their life. No one wants to have bad presentation skills either, but sometimes they just can't get it right and none of the instructions on what to do works for them. Too often guides to becoming a good enthusiastic presenter focus only on what to do and what are terrific presentation skills, and they don't even mention what bad presentation skills are. The traditional style of learning doesn't always work for people, and knowing what not to do help them more than anything else. Good voice projection requires efficient working of the lungs, intercostals and diaphragm - less known factors in superb presentation skills.