I always put 2 celery stalks, 2-3 cloves of garlic and 1 small to medium yellow onion. I baste it with a mixture of real butter, sage, salt and pepper about every 10-15 minutes. It takes time, but it is well worth it. It is beyond juicy.
As an added bonus, it ends up looking like one the adds for a turkey because it turns such a pretty golden brown.