i'm 24 and after a shitty breakup went from 180 to 166 pounds. i've stopped losing weight but i am still a little flabby. how can i harden up my mid section. crunches seem to be working only real slow and really it's not that much. i drink a lot of beer. is my only option to quit all the booze. i do lots of running. 4 miles 5 times a week. any suggestions on how to stop this plateau i've hit and get a little more hard/lean?