If you are someone that is having a hard time getting your dog to listen to you when you tell them to not get on the furniture, one of the best ways to avoid it from happening is by simply not letting your dog get into the room with the furniture in the first place. By doing this, you will be able to completely eliminate the issue altogether because your dog will be walled off. You can use a gate or something to keep your dog from entering the room with the furniture. This can be especially good if you notice that your dog typically goes onto your furniture when you are not at home.
By following the tips above, you should be able to keep your dog from getting onto your furniture. You want to be as consistent as possible when it comes to enforcing the rule and eventually your dog will understand your furniture is off-limits.