ASL and working retail.

I'm hard of hearing and my best friend is hearing with little knowledge of ASL. We both work at the same job and today he asked me a very important question. How do you provide the best service for a deaf/hoh customer? I showed him a few basic signs like thank you, help, eat; as well as telling him to write down what he wanted to ask or say and to make sure he faces the customer in case they're reading his lips. But I was wondering any other suggestions or things i might have missed? Thanks.


abbey layne