Sometimes, it's really the little things that can turn a sour day to sweet. Having worked in retail FOREVER, customer service takes a special individual. I'm always kind to people serving me, but I could sense that my cashier today needed a little boost, so I was very patient, outwardly expressed thanks, praised their work, and got a bit of a calmer smile in return. I sensed that person just needed a positive interaction, so I'm hopeful that offsets the rough start they had in their day. I feel good being nice to people and see it instantly making (even a tiny) impact.