Welcome to DTA!
I agree, the vet is the only place to go. If you don't, the bones could heal up the wrong way, causing the puppy to be in pain for ever, he could be crippled, in later years he would develop Hip displasia caused by the fracture, I could go on and on...
Maybe I'm reading it wrong... You probably mean, what else you can do, besides taking it to the vets...
Well I guess the vet will prescribe lots of rest, to keep the weight off the hip. It will take a while for the fracture to heal.
In the mean time you can keep the puppy occupied by giving a food-filled kong, teach it tricks that don't involve sitting or moving, like cross your paws, shame, shake your head, say yes, etc.
I hope the puppy will be ok!