Toys are your friend! I would get a kong,chew toys,and things they cant hurt themselves on. I get a short 6 in leash for smaller dogs on puppys. I don't walk them till they have all of there shots but it doesn't hurt to start leash training! I would get a dog bed and teach them that is were they are to lay if you dont want your pup on any furniture. I have blankets all over the house for the dogs. They usually end up either on someones bed or on the couch's though.
~It doesn't matter how smart the dog is,it matters how smart the owner is.