Like everyone is saying, the first thing you want to do in a go-around is get the plane. To do this obviously you need to add power. Then you can worry about cleaning up the flaps. A saying I was taught back when I was a primary student was Cram it, Clean it, Call it. To go around you need power so that is the first thing you worry about Add power, Prop if not already at takeoff pitch(If its a plane with a constant speed propeller, Carb heat in. Next you need the plane set for climb. Using my arrow as an example Flaps go to 15, Positive rate the Gear come up, and when the climb is stabalized the last flaps. After a climb is established, I will call the go around or the missed approach. The thing to remember is to fly the airplane first, then you can worry about everything else such as configuration changes and radio calls.