Congrats! Paid ours off last winter and it was one of the best feelings ever... we 'celebrated' by having cheap wine by the fire pit while we burned (a copy of) the payoff note... and spent the evening talking about how our neighbors would be shocked to know we'd paid it off in 8 years :)
Wow! Great job! I did the same in 2012. It changed my outlook on life. I was able to do so much more-- and take so many more risks-- because I wasn't concerned about paying the bills. The first thing I did was take a vacation to Aruba! Don't forget to treat yourself... You have done something most people will never do.