If you feel that the skin is crispy enough, before the end of roasting raise the temperature in the oven again to 220*C. Turn off the oven, but the duck will take off after 10-15 minutes. Optionally decorate. While preparing the duck did on the side, potato croquettes, fresh vegetables and herbs.
If you feel that the skin is crispy enough, before the end of roasting raise again the temperature in the oven to 220*C. 
Turn off the oven, but the duck take out after 10-15 minutes. 
Optionally decorate. 
While preparing the duck did on the side, potato croquettes, fresh vegetables and herbs.