Go back to step one in training. Aubie went through a phase recently where she peed on our BED two days in a row, ate a half a DVD, and was just being a brat. We brought her crate back out and started back at step one for a week. It only took one week and she's back to normal now. I really think it may just be them testing their limits because once we showed her we wouldn't put up with it, she behaved again.
Crate him when you can't watch him. Put him in "time out" if he gets rough and rowdy. Take him out regularly and praise just like he was a young pup again. It works, just be consistent!