I am here to help.

I had a guest today who was irritated at the price of a side of cream cheese. She was very vocal and very hard to calm down. The episode came out of nowhere, in the middle of lunch and all of us where stunned.
What do you do?
The first thing that came out of my mouth is "miss, do not get upset, I am here to help".
I assured her that I would charge her a minimal amount for her purchase. I told her that the prices were not set by anyone here at the store and that I all we wanted was for her to have a good experience.
Privately, I discussed the rising costs in goods with her, the quality of the product and assured her that our prices are fair.
She did calm down and I could tell she was impressed by our resolve.
Many folks in our current economy are very conscious of what they spend. We must give them a value and in some cases an explanation, otherwise they will go somewhere else.

Keep it clean too.

Positive interaction with the guest is crucial to their experience.
Good service will differentiate you from other restaurants.
However, always keep in mind that the guest interacts with the physical aspect of the place as well.
How neat and tidy are the key parts of your place? Is the beverage area full of straw wrappers?
Are your floors littered with crumbs?
I take pride in keeping the store neat, clean and organized(there goes that NCO again).
An inviting atmosphere relaxes the guest and sets them up for an experience that "makes them feel great"(as our owner would say).
If you make an effort, your guests will notice and they will let you know. They let me know.