– A high quality webcam/camera will help your opponent see what cards on are your field and will help with any confusion that may come with playing online. You can find tutorial videos on how to set up your webcam/phone to be able to view your entire field + your hand on youtube for other games. That same process should be sufficient, but you should test it out before the event to be sure! 
– Be as communitive as possible when playing. Be sure your opponent understands what you are attempting to do. The more you communicate, the less likely confusion is to arise. Be clear and concise on which Tower you are attacking, when you are passing priority, or when you are playing cards. Limit background noise and other distractions while playing.
– If you have any confusion during you games, do not be afraid to call a judge for assistance. Judges are here to help facilitate gameplay and ensure the event runs smoothly!
– Keep your hands above the table and visible at all times.
– Have a way to easily look cards up. Instead of asking your opponent to read their card’s effect to you, have your phone or tablet by your side to easily look up the exact text of a card!