The emergency call comes unpredictably: this is the cautionary advice from presentationmagazine.com. However, while you perhaps cannot look your best, always try to avoid looking your worst.
Write down some notes
Even if you have virtually no time, take a moment and write down some notes. This will help you to navigate through your presentation without losing your bearings. Just a few post-it notes will suffice. You should write down three or four key points.
Minimise the impact of an unprofessional appearance
Your appearance may not be optimal – you are unshaven or have no make-up … In that case, be at the centre of your background, which should contain as many items as possible: that way you will shift attention away from yourself. So if you are in a room full of objects on the walls (such as a bookcase or some message boards), this will help. Also try to sit slightly further away from the camera. And if you have a baseball cap (ideally with the company logo), use it to conceal hair that might not be perfectly combed.
Check your audio
You need the sound to work as best as possible. Minimise all audio distractions in the vicinity. Shut the door so there is no noise from traffic outside or from the television in the next room.
-jk-