IF YOU HAVE THE BALL:
Possession means you can score! Every turn try and gain as much ground as possible, this will bring you closer to the try-line and hence closer to scoring! You will probably have to run into some defenders to do this - don't be afraid, its all part of the game. Remember to make the breaks, force the errors and to take your chances!
IF YOU DON'T HAVE THE BALL:
This is the most difficult part because you need to have lots of patience. There is nothing you can do except move your players around setting up your defense and making tackles. Your aim is to try and apply pressure and this forces errors. You do all of this by setting up some of your players next to the ball carrier so they can tackle him in his turn. The rest of your team needs to be set up to make sure there are no gaps. They also have to be placed in positions where you think your opponent is going to try and attack at or through.