hehe sounds like my boy Liv when we first had him as a single chin. Since we've gotten a few more little boys he no longer comes to my boyfriend and I for humping, only Indy
Anyway, chins are very stubborn and sneaky. He WILL keep going back to doing bad things unless you make it impossible for him or try to teach him. Chins can't really be "trained" like dogs because they're very independent creatures but like Joann said, you can try time-out. They're smart and they treasure their playtime, so if you take it away from him when he's doing something bad, he'll eventually learn that he needs to stop whatever he's doing so he can continue to play. Also, i would suggest a bathroom for playtime, there's not much he can get into and it's probably a smaller space so you can watch more closely. If you don't always want to sit with him while he plays, you can try a large play pen for him to run in with a few toys and tunnels... but make sure it is high enough so that he cannot jump over, chins can jump very high! the pen may need to be 5 ft high. As for chewing and stuff, he will always do that...they need to chew to keep their teeth at a healthy length. I would just suggest keeping a close eye and trying to block anything that you don't want him getting to. Otherwise, good luck!