We harvest over 200 pounds a year from my dad's tree, so I have lots of recipes archived. Here are some of my favorites. Have fun!
Poached quince (plus lots of good info on preparing and eating quince)
http://www.davidlebovitz.com/2008/11/rosy-poached-quince/
Easy quince paste (dulce de membrillo). I use less sugar than this recipe calls for:
http://locallypreserved.blogspot.com/2010/10/membrillo-quince-paste.html
Quince and Pumpkin Ratatouille (with eggplant, peppers and tomatoes):
http://www.brisbanetimes.com.au/entertainment/moor-please-20130725-2qk4u.html
With cranberries, this is great for Thanksgiving:
http://hungrytigress.com/2010/10/quince-cranberry-holiday-preserves/
Quince Crumble
http://www.nytimes.com/2010/10/06/dining/06londonrex.html?_r=2&partner=rss&emc=rss&
Quince-infused vodka (I don't add any sugar at all. I also make quince-infused tequila, which is fabulous):
http://thequincetree65.blogspot.com/2010/10/quince-diaries-4.html