When I turned thirty, I posed for a picture holding a cardboard sign with the words “goodbye twenties” sprawled across it with a black sharpie. My friend said to me at the time: You’re going to love your thirties. You know who you are, what you want, and how to make it happen.   Boy was she right. I made big changes to my life before this picture was taken. I said goodbye to relationships that brought me down. I focused my heart on the positive ones. I paid more attention to myself. I started working out again. I began to eat better. I smiled more.   I stopped sitting on the sidelines and letting opportunities pass by, grasping only at the straws of missed memories. I danced my heart out at a Bon…