Before your session begins there are a few things you can do to ensure it goes off without a hitch.
Test your audio and video on the device you'll be using (there is a handy "Launch Test Session" link in the upper right-hand corner of your dashboard).
Put any distractions away.
If in a home/office environment, close your door.
Take a bio break; get a water/coffee.
Decide what to work on first; prioritize important over urgent.
Show up 2-3 minutes early.
Keep your dashboard open and logged in for fast access.
Courteously communicate last-minute changes when they're unavoidable. Canceling sessions as soon as you're aware you cannot attend gives your partner a chance to find a new match before the appointment time.