This recommendation is based on the tvfool radar report for 01-12-2012. Of the Current Plus Pending Applications Included for Digital Only Channels.  If your house is wood frame with wood or vinyl siding.  A Simple Indoor NON AMPLIFIED antenna such as a , Channel Master CM4010 or Terk HDTVi indoor antenna aimed at about 78 degree magnetic compass , will receive most but not all of the digital tv stations/channels in the green and yellow zones of the tvfool radar report.  Here is how to aim indoor antennas , 
http://www.kyes.com/antenna/pointing/pointing.html. Here are places to buy indoor tv antennas , 
http://www.channelmasterstore.com , 
http://www.solidsignal.com. If however the house is , concrete , concrete blocks , cinder blocks , bricks from ground to roof , big rocks for walls ,  metal siding , metal backed insulation , metal roof , solar panels , close big thick dense trees , then reception will be reduced or blocked.  Also the indoor antenna needs elbow room , do not stick the antenna behind a entertainment center or behind a couch or in a closet or  etc. , it is best to get the indoor antenna up high in the clear in the room for better reception.  The rods of the indoor antenna will be adj. to a low V <- lower then this example.