Before your session begins there a few things you can do to ensure it goes off without a hitch!
Test your audio and video on the computer you'll be using (there is a handy "Launch Test Session" link in the upper right hand corner of your dashboard
Put your phone away, and turn it off or put on silent mode.
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.
Array your screen to keep your partner visible; use a phone or tablet if needed (if using an external device be certain to test launch a video session from there as well).
Keep your dashboard open and logged in for fast access.
Courteously communicate last-minute changes when they're unavoidable. Cancelling sessions as soon as you're aware you cannot attend gives your partner a chance to find a new match before the appointment time.