The presentation Put on the microphone and be sure that it is working before you start talking. Be sure everyone in the room can see your material. With transparencies, this often means that you have to pay attention to the position of the transparency on the projector because only the top half of the screen usually can be seen from the back of the room. Make sure you do not block the screen. Move around if you must so that everyone has a chance to see everything.
Handouts are a big help.
Never apologize for your displays. Don t apologize for incomplete results. Researchers understand that all research continues. Just present the results and let the audience judge. It is ok to say that work is on-going .