Make Magazine shows us how to make your own antenna, yes the over-the-air, digital variety. Not a project I'd probably tackle, but if you happen to have some scrap wood, coat hangers and a few other relatively inexpensive parts around the house you can do this yourself.
The Video How-To Below:
Maker Workshop - DTV Antenna & Steadicam on MAKE: television from make magazine on Vimeo.
More information including a PDF download is available at MakeZine