For many people, giving a presentation is like going to the dentist. Necessary but unpleasant. Part of that unpleasantness comes from anxiety over the unknown: "What if I freeze or lose my train of thought?" "What if someone asks me a question I don't know the answer to?" "What if I get the 'blue screen of death' on my PC mid-presentation?" A bit of anxiety can be a good thing. Knowing all eyes will be on you can help you focus, invest extra work in your presentation and bring out your best performance. Too much anxiety, however, can hinder your performance or paralyze you with fear.