Pressers
Try to Delay the player on the ball from attacking forward, this will allow the other players to get into positions
Try to Show the player away from goal, think about your body shape when doing this and where you need to stand
Try to make the right decision when winning the ball back, will you intercept, block tackle or slide tackle? Remember do not jump into a tackle when the ball isn't yours to win
Covering players
Recover into a covering position as quickly as possible
Try to show good body shape and positioning to provide good cover
Try to be aware of the player attacking with a dribble and also prevent him passing forward to the attacker [look behind you for the striker!]
Balance players
Try to find a good position that will give good balance in terms of where the ball/goal and other defenders are
Try to give balance on the side of the goal and the ball
Be the best communicator in the group
Create a resolution to develop your coaching confidence by seizing the opportunity to discover new drills, turn ideas into action and seek advice from the coaching community.
World Rugby has reportedly conceded Aaron Smith's disallowed try in the World Cup final should have stood.
"It is not only useful for staff who are experienced but a valuable tool for those subject staff who have to take teams."