How do you rate yourself when it comes to communicating with your customers? Do you find yourself spending too much time chatting with them, or do you get antsy, wishing they would leave you alone so you could get your work done?
I think most customers can sense you have much work to do , so always acknowledge their existance and the quicker you can provide assistance,(customers are generally in a hurry) then you can get back to other needed task. I would give myself a decent rating ofcourse.