this is pretty much my biggest golf problem (concentration). Today, i shot par on the front 9, had total control of my head and gold ball, par'd the 10th and 11th and then completely lost any and all concentration. Typically I carry a few energy drinks to help me keep focused. A buddy who is a doctor and knows me well told me to try it and it helps but i didnt have any on me today. ended up shooting 78 which is good for me but not where i should have finished.