Step 1 - Buy a cheap antenna - Buy a Basic Indoor Antenna for less than $10. Remove your existing cable and connect the antenna to your TV, and re-scan the channels on your TV. If you have a newer TV that accepts digital signals, it should just work without any further adjustments (skip to step 3). If you have an older TV, you may need a converter box... move on to Step 2. If you receive some channels but not others, you may need a better antenna. You should visit www.antennaweb.org to determine your antenna needs.
Step 2 - Buy a converter box or HDTV (optional) - If you have an older TV set, one that only accepts analog signals, you can buy a digital to analog TV converter box to use an antenna to get TV broadcasts. These boxes cost about $40 and are very easy to install. If you have a much older TV, and think you're going to be in the market for a new TV soon, it may make sense to buy a new TV instead of buying a converter box for your old TV. You can buy a new 19" or 20" HDTV for less than $200. For example the Vizio VA19LHDTV10T costs only $178.
Step 3 - Call your cable company - Pick up the phone and tell your cable or satellite provider that you are cancelling your cable tv subscription. If you have second thoughts and think that you can't live without all of the channels cable has to offer, consider buying a Roku box and subscribing to NetFlix. With over 17,000 movies and TV shows available for $9 a month, you'll have more than enough TV to watch. Don't worry, any decision you make is not final. Believe me, cable companies are always willing to take your money, so you would be able to re-subscribe at anytime.