Make sure you have fresh and/or fully charged batteries
Double check that outlet has power and cables are pushed in fully!
Create a new user account and present from it, not your everyday account
Avoid showing the world your everyday desktop, background, bookmarks, etc.!
Can use 'user switching' so that you don't even have to log out of your everyday account
Ask for accessibility accommodations when you're applying to present
Verify at check-in that those accommodations have been arranged