Get a cheapie rabbit ears antenna at Walmart and get a true HD signal for your local broadcast stations. For most people that live in a metro area with close access to the local broadcast towers a plain old rabbit ears is good enough. You will notice the difference in quality. The "HD" offered by cable is compressed, it's not true HD.

Kind of off topic but if you have shows you want to watch it is one way until they figure it out. You may even find that you prefer the local channels with the antenna. Of course you would have to choose a different input source on the TV to go between antenna and the cable box is all.