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. This invites the audience to tune out or wonder why you are talking at all. Gather you materials and move off quickly to allow the next presenter to prepare Stay for the entire session and, afterward, be available for people to ask you questions.