Number one rule is to NEVER overcook. Always have the meat slightly pink. If you are going to pluck the ducks and roast them, 350 for one hour should be good depending on the size of duck. Cutting the breasts thin and then slicing a few peppers and onions and stir fry then mixing in some cooked broad noodles is one of my favourites. Spice the way you like.
BBQ, soups, pulled duck, just fried breast are just a few ideas.
I am sure other folks will be more than happy to add to this.
Remember rule # 1
Ron