Mwah ha ha ha... I mean, my heart goes out to you OP
Our English Black Lab just turned three. He is hilarious and still has that impish puppy attitude. But do not despair, certain things will get better.
Don't know where you're located but if you're in Maryland, I recommend Sit Means Sit dog training - they're the real deal. It REALLY paid off or both us and the dog. It lead to our pup being on the GOTEAM and now we're considering search and rescue. Neither would have been possible without proper training.
Tip: I don't know if she fetches yet but when both our pups get super would-up, I play a quick game of fetch, which often satiates them ... for a while.
But take LOTS of pictures and cherish the moments when she's at her most mischievous best! And don't get too comfortable if she hasn't destroyed anything - it could kick-in while you're away one day and she gets bored or frustrated...You didn't need those new Sketchers anyway