Blue Heaven, if your dog is destructive, most likely is cos he is bored. Buy more puppy toys for him to keep him occupied when you're not around.
Dat's wat I do when mine is a puppy. He'll be much better when he reaches 1 yrs old.
Mine daily routine now is wake up, eat, kai kai (poo & pee), sleep, wake up, eat, kai kai (poo & pee), sleep...