If you are happy and you know it clap your hands...
Even (like me) if you have woken up on the wrong side of the bed or had a bad start to the morning... choose to be happy today.
I spent half of last-night up and there is no blaming it on the kids (they happily slept 7pm-7am). It would be easier for me to walk around grumpy and take it out on everyone.
But I choose to start today being happy. And it is amazing what a positive outlook can do for your day.