Offensively: It is a winger job to find something to do. May it be misdirection(switches). Whether or not you get the ball, you want to keep the defense honest. If the ball is not going to you, keep the defense flow/drift away from where the ball is going. Understand the forwards have to be very mobile and sometimes you may want to turn into a forward temporarily. If your on the strong side, be the first to ruck on wide ball. If your on the week side, help the forwards if they try to break the defensive line instead of doing nothing. Defensively: Whenever I see someone struggling to tackle, it is usually because they don't know where to look and are not using proper form. YOUR EYES ARE ALWAYS ON THE BALL CARRIERS HIPS. If you do that, you will never miss because the hips rarely move except in the direction the ball carrier is going. You would always keep your head up because your are seeing what you are hitting . Other than tacking, take a look at the videos in the source to see how to defend against overloads.
