Changing the way you eat is considered a "lifestyle change" or "lifestyle choice"...call it what you may, but it all takes "practice". It shouldn't be THE focus of your being UNLESS you are told by a medical professional that if you don't change the way you eat, you're gonna wind up self-destructing...
As far as 30/40/40 thing goes, don't sweat it. Just try to eat SOMETHING healthy from each food group each time you sit and consume. I agree, giving up processed foods is a great way to start changing the eating pattern--for many, it IS a lifestyle change. Sorry, but you DO have to prepare when you make a choice to change something about yourself...as in, make time to shop and prepare your nutition.
I always tell clients to just do their best for 2 days...just 2 days of eating as healthy as possible. The third day, just screw up and see how you feel (usually yuky). If you can tackle the "d" word for two days at a time, you'll wind up on the "good foot" 4 days out of 7. I'll take those odds for a start!
The Atkins thing...every single trainer and nutitionist I talk to just shake their heads in sorrow. Yeah sure, you can run your car on no oil 90 miles and it will make it from point A to B, but at what cost?? I think Atkins died from a fall because he didn't have enough carbs in him to function! He was an nut that believed that if you were diabetic and followed his diet , you could give up injections/insulin tablets. I heard him say it on a talk show just before he died. The body machine cannot survive on his theory because there is too much evidence that proves other wise. Why does loosing 10 lbs have to feel so bad and screw up your body chemistry make it right? I think Atkins dieting is soooo destructive. Also, those folks who tell me, "Oh I do a modified form of Atkins" or "I just do Atkins for a few days"...you're really not doing more than a crash diet...you'd do better with a 24 hour fast.
Sorry if I lecture...it's your body.
Terry