Reward your beloved dog for good behavior. The best things to use for rewards are healthy treats. If you know the dog has a favorite food then you can use that as reward as well. This will be anything to show your pet that they are doing well and you are pleased with them. This reinforces the good behavior.
Don't reward a dog for bad behavior. Take for instance Rover jumps up on you when you enter the house each day. He won't stop until your give him a treat. If you give him a treat to stop then you are rewarding him jumping up on you. This tells him it's alright to do this and sends a mixed signal if you scold him. This is reinforcing actions you want him to stop.