You don't.
Although, this year everyone will be a distant 2nd to Tebow. No matter their statistics, how many game changing plays or if they find the cure for cancer, it's Tebow's regardless. The media is fascinated with him right now and IMO, they are looking forward to giving him the title of "Greatest College player of all time". The heisman will just be the icing on the cake.
I'm sure Tebow will probably have an amazing year and be very deserving of the award, but I just don't see the media being fair towards other players that may be just as deserving.