Those of us who have been fortunate have a duty to give back.Whether one gives a lot as one goes along as I do, or a little and then a lot (when one dies) as Warren does, is a matter of personal preference.
On vacation go to the most remote place on your itinerary first, bypassing the cities. You‘ll maximize the shock of otherness in the remote, and then later you’ll welcome the familiar comforts of a city on the way back.