Always offer fresh, high-quality coffee or tea.
Make sure it’s good. It’s this kind of touch that shows you care about your customers. You might also want to offer bottled water for those who don’t care for coffee or tea. There is nothing worse than a company that cares so little about its customers that it makes them wait in a cramped waiting room with battery acid for coffee. The right beverage, at the right time, can have a very calming effect (even if it has caffeine).