One of our snowblowers has replaceable rubber paddles on the auger. These get worn down from making contact with the concrete or asphalt driveway. The snowblower will no longer scrape the snow off the surface of the driveway or sidewalk once they are worn. After that you are basically just walking around pushing a snowblower and getting cold.
Home Depot site for $59.00. I used Ebates for a 1% rebate and used in store pick up to eliminate the shipping cost. The paddles also come with the replacement bolts. This is great in case the bolts you are removing are so rusted that you need to cut them off with a cut off wheel. We were lucky and our just took a little elbow grease. If you plan ahead you can squirt the bolts with a penetrating/rust dissolving oil a couple of days before you plan to replace the paddles. This will help loosen the rust so that you can remove the bolts.
Total time from start to finish.....35 minutes.