With each and every different job/career we do, none of us escape without a constant interaction of other people, its part of the thread of life in a way. Most we interact with along the way are sometimes pleasant out of necessity, some are out of courteousness, some are "just because" they have to "force" a smile back when we flash one their way. The most thoughtful are the ones you might forget in your day who took the initiative to smile or say a kind word to you first. When everything is stressful, and you're rushing about getting ever more stressed, these are the ones to look for and remember.
Today I came home from work with my head about to explode, I sat down phoned a few mates, then poured a beer and un-wound, I suddenly remembered that person earlier on today that smiled at me and said a kind word. Out of all the many I met and interacted with, that was the one I remembered. It lifted my stress, and sort of me smile back inside. Amazing what a small gesture amongst hundreds of other interactions can do.
SMILE at someone tommorow.......(.but don't look crazy about it!....you'll get arrested!)