My mother, by her example, taught me that we should always do our level best to be gracious. As I see people serving the public in retail, restaurants, housekeeping, home services, hotels, etc., I remember that these folks recognize and truly appreciate kindness. And they really need it daily.
Tip servers, leave kind notes (and tips) for housekeeping staff, write Google reviews about a company and specifically highlight the person who made your experience worthwhile. And if you didn’t experience an exceptional “over-the-top” event, still be gracious. We all have occasional bad days.