Thanks Glenn...always enjoy your posts and insight.
I garden and always over plant so there is always an abundance.
I pick in the morning and then take the surplus in the van with me.
When I run into someone - clerk, cashier, stranger - who looks glum or having a bad day....I simply ask them if they would like a freshly picked tomato, or some freshly picked green beans (whatever I have with me)...and their demeanor changes almost immediately when I hand it to them. In the event of cashiers or clerks, the next visit to where they are working I always seem to get a generous smile and excellent service

) ...and the strangers always have a greeting and a smile when I run into them again in my travels (live in a relatively small populated area so seeing them again is quite common.
We used to have a roadside vendor that was quite blunt and seemed not very friendly or talkative.....on a hot summer day I passed him sitting there on my way into town...I grabbed a can of pop from a vending machine and on the way back home stopped and handed it to him....we have been friends ever since.
These methods do work, and it is always a pleasure reading about the ones you employ.
Cornell