Overcome a bad diet?

In case you can't read my handwriting, it says "Nothing can overcome a bad diet."  Its attached to my monitor on the lower right side.  This keeps me out of the vending machine at work.  I don't remember where I read, but it struck a chord.  The late Jack LaLanne said "If it tastes good, spit it out".  I'm too firm a believer in joy de vivre to agree with that.  I believe in a short list of dietary non-negotiables coupled with moderation in the rest. I know some people who have sworn off donuts.  I get that, but I'd rather put some rules around it so there is moderation in donut consumption.  I only eat donuts from one place and I'm not telling you where for fear that some well intentioned person or a competitor in my workplace's Biggest Loser Contest could derail me.  It's not a place that most people I come in contact with buy their donuts, so it really is a limiter.  The reason I picked the one place is that those donuts are the best I've put in my mouth.  I know that foodies will say that I must get out of West Tennessee to experience the Platonic Form of Donut, but I'm just fine with my moderate approach and having experienced only the limited offering available in my area, which happen to find more delightful than words can express.

Speaking of Jack LaLanne, one of my oldest friends, Scott Haynes*, posted the following link.  I could not come up with anything better or more fitting, so I'm including the link. http://sethgodin.typepad.com/seths_blog/2011/01/eight-lessons-from-the-life-and-work-of-jack-lalanne.html

*We were born within a few days of each other, literally one of my oldest friends.  Myth+ says that our mothers passed each other at the hospital on my birthday, Mrs Peggy leaving, my mom arriving.  33 is coming up fast, bro.

+Myth, Lore, and Legend refer to things I've heard in my life and don't necessarily believe just as they were told to me.  They refer to specific people who tend to exaggerate, but I'm not getting any more specific than that.