Today the D have to be part of a 4 man attack and the key is to read the game situation.
1. The puck moves faster than any player can skate so the D have to pass to any teammate who is in better position than them to get the puck up ice. He can't be carrying the puck all the time and make everyone stand still at the blueline so they don't go offside. He should pass and then follow his pass and become part of the play.
2. When either D sees a forward with good possesion of the puck he should jump up and become part of the rush and one of the 4 players attacking. When he sees his team doesn't have good possession then he has to drop back, which is easy because he will have a lot of speed. If you are playing 1-2-3-4-5 then the first 4 should be in on the rush and 5 support from behind.
'The Game is the Greatest Coach'
'Enjoy the Game'