Keep the Confidence Going
See the actual presentation situation as a stage performance. Ensure that you make it early, start the presentation on time, move and gesture with self-confidence, and maintain eye contact throughout. Don't stare at the walls or the ceiling. Always make eye contact with your audience, as this speaks volumes about your confidence.
Take the Questions
Keep the audience involved in the discussion by asking frequent reinforcing questions, like 'Don't you think?' or 'Isn't this Interesting?'. Take charge of the 'question and answer' section. Rephrase questions oftentimes to be sure that you heard the question correctly, which will also give you a little extra time to think about the answer. Do not be very prompt in giving an answer to a question before you truly understand it. Make it a point to end the presentation effectively and resolutely.
Keep Copies
It always wise to keep backup copies of your presentation. Take printouts of the presentation and hand it over to your audience, so that they are in sync with you during the presentation. Also make sure you have taken a backup on a USB device. Most importantly, it is advisable to carry your own laptop, a fully-charged one though. You don't want to search for the charger while making the presentation, do you?
Dress Comfortably
It is very important to make a good first impression. Men can wear a neutral-colored shirt with a dark-colored trouser. Ladies can opt for a skirt or trouser suit. Make sure your clothes are washed properly and neatly ironed. Don't go overboard with the accessories either. A smile will definitely help you score those extra points. The main point here is to make sure you look professional.