So great - congrats, and I wish you were closer to NYC! How exciting!

You got so many great suggestions. Here's one that could apply to a lot of businesses:

I think customer service and staff training is really important. We have a great local running store that treats everyone like a serious athlete, in a really nice way - even the slacker looking teens are really nice and helpful. I don't know if they do a lot of training, but they do all seem to be functioning under a great philosophy -- the manger is very nice and treats his employees kindly and firmly in front of customers.