We always buy a Thanksgiving turkey that is WAY too large for the number of attendees. Why? Leftovers!
A tradition I started when my sons were pre-teens was turkey soup. I stuff the turkey with onion for roasting, debone the bird while it's hot (easier to eat, leftovers take up less room in the fridge), and boil the carcass. Roasted onions, boiled with everything else, add great flavor. This one also had a 1 cup of leftover giblet broth that wasn't needed for the dressing.
This year my younger son asked me to make egg noodles, which is a chore. After spending 3 hours in the yard working, I was not up to it ... so I cheated ... I made spaetzle, which is far easier!
Making the soup is easy -- bring the stock to a simmer. In my case it's always too thick so it congeals somewhat in the fridge over night, and I have to thin it. Add sliced celery and let it simmer 10 minutes, then add the chopped turkey, carrots, and dried parsley, and let it simmer for 20 minutes.
When adding carrots I check seasoning, it usually needs some salt.