Hey hey,
Diet... hmmm, I would say that I'm a naturally healthy eater- I like real food, that I made from ingredients... meat and vegetables, not pre-processed horse. My major downfall, however, is wine... and then with wine, cheese. Problem being that in the quantities I was having them gave very little nutritional benefit. My fiance is a sugar fiend and doesn't exercise nearly as much as me, so if we do eat something like fish and chips, unfortunately it shows on him, so I am trying really hard to limit those treat type things to 0-5% of diet rather than about 20%.
I gave up alcohol for January, and I found it naturally lead to a much healthier diet, and a brilliant month of training, so whilst I'm no longer cold turkey, I do notice the effects of eating better and not drinking. And we barely have any cheese in the house now. (It used to be a selection of gorgonzola, camembert, cheddar and brie, pretty much on tap the whole time. Now I just have some cheddar about usually to sprinkle on stufff or use in cooking.)
When I was a rower we used to do a 2 week drinking ban before races... that may have been because we were at university, and therefore the concept of 'just a glass' didn't really compute...