"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Turning 40 is cause for celebration! It's the start of a new decade in your life. If you're looking for a ...

Add Yahoo as a preferred source to see more of our stories on Google. Forty is the new 30. It feels good to be turning the big 4-0. You’ve accomplished so much, and you’re right where you want to be.