Visualize the bag as an opponent and hit as if being hit.
In other words, use lateral movement, and bobbing and weaving, to set up a technique, or series of techniques, on the premise that the bag is a living breathing opponent throwing its own combination of punches.

Try swinging the bag to make it a moving target. This will make it harder to hit, and improve the workouts real-life application. Hitting the heavy bag will also build confidence translatable to a real life situation. Building power and developing ones technique on the heavy bag, will better prepare one to respond when it is needed (in the dojo or on the street).

Dave Hague © Golden Valley Karate 2011