Answer:
I sit in a corner while travelling around the world.
Break me and I am better immediately set and harder to be broken again.
I am the key that is the hardest to turn
I belong to you but others use me more often than you do
Every night I'm told what to do and each morning I do what I'm told. But I still don't escape your scold
Though not a plant, has leaves. Though not a beast, has spine. Though many wouldn't need this thing, It's more valuable than wine.