We started a new nightly, pre-show tradition this summer. It's called the gratitude bucket. Each night our stage manager, James, sets the gratitude bucket center stage along with some pens and paper during mic checks and warm ups. Each cast and crew member then takes a moment to write three things we're grateful for that day.
It's interesting to me that after each hugely positive experience I've had in life (ie last night's opening show - see vid for details), I always end up with an overwhelming feeling of gratitude.