Neapolitan mastiff owners only please?

I am shortly to become the proud owner of a Neo(male) and he will be ten weeks old. I have been in touch with the breeder for almost two years, have read all the books, research food etc. I know to keep then light and limit exersise etc.and I am the pack leader but any off the wall tips you experianced owners can give.Oh we also have a really well mannered female GSD too . I am just keen to get the knowledge of experianced owners too. thanks in advance