or you can make a round of hard cardboard (or buy one at the craft store).
if using cardboard, the best way to do it is to wrap the cardboard with foil. slide the cheesecake onto the foil-wrapped cardboard; you can spray some spray oil on it first to help remove it later. then wrap with plastic wrap (bottom and all), spraying oil on the top layer too. wrap with multiple layers, freeze fully and then place in a harder container to protect. unwrap completely to thaw in refrigerator.
when almost completely thawed, put back on spring form bottom or other serving platter for serving. for fruit-covered cheesecake, make that at the 