In a few days I will be joining the half-century club. Most of my friends beat me to it, including my husband. My sister was inducted two years ago. My father's been a card carrying member for over 20 years. Yes, I'm turning the big 5 - 0 and I'm excited. My girlfriends already threw me a surprise party but before I officially turn the corner, here's a few things I learned during my decade of being 40.