Another time a deli worker at the grocery recommended a good turkey flavor, when I saw him next (it was weeks later) I made sure I told him how much I enjoyed it. I then told someone next to me (unsure of what to get) how the man put me on to a delicious flavor (boars head sausalito FYI). I still say “how are you doing sir” when I see this man working and I’m shopping. He remembers me even masked.
All of this really just involves taking things you notice and instead of keeping it to yourself, sharing it! It’s worth doing! I don’t do it for any selfish reasons (except maybe to keep my observation skills sharp). I genuinely feel an appreciation for sharing things I notice about others as they live their lives. My only hope is it makes them feel good about themselves.