What do you do when your old dog picks on a puppy's bad habit?

You could take them to a training class. Other than that, here's what I've noticed with my dog a little. She'll be barking and jumping on me, but then i just turn around and give her no attention, and she will stop jumping/barking. I know personally, my dog loves attention, so when I wasn't going to give it to her, she stopped jumping, etc. So, when your dog jumps on you/couch, don't pay any attention to them. If your standing, literally turn around, and look up at the ceiling. This helped for me, might not help with you...kind of depends on the dog I guess, but it would be worth a try, good luck! :)