More and more people are foregoing cable and satellite television to save a bit of family income, realizing that there is plenty of free television out there to watch. Many of those people are purchasing overpriced and underperforming commercial HDTV antennae, when you can make a simple antenna yourself out of an inexpensive 3' or 4' long 1" X 4" or 2" X 4" board, some short wood screws and washers, and some inexpensive metallic wire (galvanized "baling" wire works just fine), and a couple of short pieces of tape (electrical tape; or if you want to truly construct a quality product, of course consider duct tape to go with your selection of baling wire). You also want to find a piece of heavy cardboard about 2' X 3' in size, enough aluminum foil to cover one side of the cardboard, and some spray mount or other adhesive to glue the aluminum foil to the cardboard.
As far as tools go, you'll need a drill with a bit to match the size of your screws, a screwdriver to match your screw heads, needlenose or pointed pliers, and wirecutters.
As explained in the OPTIONAL last step, it is possible to construct two of these antennae facing different directions and obtain signal from multiple sources and directions.