It's still a work in progress, but the waiting at the bottom of the stairs until told she can go up is a definate bonus! We still have a baby gate up, so she doesn't get free access, but I can now ask her to wait as I go up, then tell her ok once I'm at the top, so we have no risk of tripping over each other when going up and down the stairs.
I think the most useful thing, though, has to be a reliable give - especially as she likes to steal hats!! It was far less embarrassing when she stole someone's hat in the woods, as I was able to get it straight off her and return it, before hiding in shame!!!