Practice with Post-it® Notes
Part of developing effective eye contact is learning the choreography of looking around the room and holding eye contact for 3-5 seconds. To practice, try this drill. You can do this exercise standing or seated.
Put Post-it® notes on the walls of your office or living room, give yourself an impromptu question and hold your eyes on each note for 3-5 seconds while answering. Try not to follow a pattern. Practice engaging the entire room. Once you've mastered this exercise, it's still helpful to use it when preparing for an upcoming high-stakes presentation.
If you do this exercise while practicing your material, you're much more likely to keep your energy focused outward when the big day arrives.