Here's a trick to make your day better. Take something pencil-like (a pencil works great) and hold it by the ends with your two hands. Put it in your mouth like a bridle on a horse. Go ahead and push it way to the back and up a little . . almost as if you were smiling.
You should feel happier; most people do. Well . . do you?
What just happened was muscle memory. Because your muscles are in that position when you smile, and you smile when you are happy, your brain has become "reverse-wired" to act happy when those muscles get "smiley".
Oftentimes, making today a good day is made up of little happinesses. Let this be one of yours if you need a pick-me-up.
Also, watching your friends and co-workers perform this little experiment can make today better for anyone watching. Have fun!