Happiness and expectations.

A very wise man once quoted someone else to me (since apparently this advice has been around for awhile), saying: : "The source of all unhappiness is unmet expectation."  The context where I heard this isn't important now, but I think of the saying often.  No matter where I am or what I'm doing, or what's being done, there's always the option to decide on adjusting my expectations.  Works like magic.  Mostly.