Things may not always turn out the way we thought they would. The day’s events may not always fall according to “plan”. But when you learn to let go of your impossibly strict expectations, and just savor the moment as it wraps itself around you, then you will most likely find happiness in the most unlikely situation.
Nothing wrong with having a plan, of course. But every once in a while, it wouldn’t be a terrible idea either, to live your life free to appreciate life itself as it happens.