Play the first 45 minutes of Full Metal Jacket over and over and over and over. Pay particular attention to the parts where Gunny says things to Pyle like...
"You are a disgusting FAT BODY!"
"Your ass looks like about 150 pounds of chewed bubblegum!"
Seriously, I'm not saying you are a fat body. But, when I had my little heart scare in January I decided (actually, the doctors told me) to lose about 20 pounds and change my eating habits slightly. I've cut way back on fried foods, although I don't avoid them entirely. I've also cut back on my breads and drink a lot more water. I've mostly given up Cokes (unless there is a little rum in it - and that's no more than two nights a week).
So, if you're wanting to eat a little more healthy, play Gunny's comments over in your mind when you are tempted. I'm totally serious about this. I also hear Super Dave from one of the classes when we skipped lunch. He said, "Gentlemen, food is a crutch." These are the kinds of comments that give me the will power to turn my nose up at fatty foods or anything fried.
I sincerely hope this helps you, my friend.