This is especially true for new to you dogs. Keep treats out of reach for your dog around the house, so you can reward at any given moment. Anything you see your dog doing that is a behavior you want to see again, reward him/her for that behavior. You can use those treats you have on hand or you can say “good boy/girl”, give a gentle (calm) pat on the head, etc.
Ex: taking treats out when you take your dog out to potty, is a good idea so you can reward him for going in the place you want him to go.