Firefighters AND a Tiffany necklace? Nike Women's Marathon in SF - You are given a Tiffany's necklace by a firefighter in a tux when you finish! If that doesn't motivate you to finish, I don't know what will!
just keep breathing: someone on the half marathon course this weekend held a sign that read “there will be a day when you can no longer do this, today is not that day!”, and I found it to be extremely motivational. I hope that day never comes!