Here's mine, posted up in my craft room so I can see it all the time:
I simply covered a piece of cork tile with fabric (a fat quarter fit perfectly) and then added photos of loved ones, the pink "S" that always makes me smile, my business card, and some things to remind me of my travels to the Philippines and Hawaii. I then found a quote I liked about happiness and put it right in the middle of the board.
I know I'll continue to add to this as I come across more things that make me happy! I hope you take a minute today to think about those things that make you happiest... I'm sure it will make you smile.