I found that diet, (I am very big on the low-carb thing/modified Atkins diet), has worked well for me, but it takes about a week of fatigue to get through. I also don't eat anything that is white. White bread, (or any bread for that matter), sugar, flour, salt and milk. I also used to do alot of sugar free, low carb energy drinks and caffeine, and although I haven't cut back entirely, I found that they still would have a downer effect by 1PM or so, so now I will try to fit in a 20 minute nap in the early afternoon. Then I try to be in bed by 10PM and up by 6AM, and I try to keep my sleeping cycles a regular as possible. Lastly I try to walk my dog at least 5 miles a day.
It might not work for you, but I just had a physical and was given an A+++ by my doctor for a man of my age, in fact he said I am healthier than most 30 year olds, (I'm 42), and I was still drinking heavily at the time. I can't wait to see him next year!