Every Dog Gets Tired

Our friends came to hang out and brought their French bulldog, D, and Benji played and ran around with him for hours creating a very obedient and exhausted pup. Not only that, but he has gotten into the habit of (sometimes) scratching at the front door when he needs to go out to the bathroom before going in the house. This cue really helps me realize when he needs to go but we generally follow the rule of after every meal, 15 minutes after water, after every nap and playtime.

I have begun to use the 'shake can' which really scares him. I think the first step is understanding the dog before applying all this stuff that will only confuse him. I just want to understand why Benji is doing an action that displeases me before I decide how to deal with it. Why is he chewing the coffee table leg? Why is he peeing in the kitchen? Why does he try to jump up on the sofa? I know getting him tuckered out really helps immensely with dealing with him every day. When he is tired, he is just so much more of a joy to be around!