If you are helming the boat (you didn't say), keep focused on which direction to turn if you get overpowered - you want to steer downwind. It's a difficult transition to make because when you are sailing with the wind in your face, you normally turn into the wind to depower. The spinnaker will allow the boat to build enough apparent wind to put the wind in your face and you will have to fight the reflex to turn the wrong way.