What u know about this shit?

I am constantly struggling with trying to be healthy. It comes and goes in waves. I mean, I know what I need to do and it's so easy. I need to :
~drink 64 oz. Of water everyday
~exercise for an hour at least 3 days a week
~eat sensibly- fruits and vegetables
~no eating late at night
So simple, right? SO why in the hell is it so damned hard??? Why have I been trying to lose 20 lbs for years?? Why have I gained damn near 20lbs in the last 5 years?? Now, they may not sound like a lot to put in over five years, but what if I put on at least 4 lbs every year?? At that rate, I'll be 20 lbs heavier every five years!!! By the time I'm 50, I'll be over 200 lbs!! I'm only 5'5", so that is soooo unacceptable!!!
So, if it's so simple, then why is it so hard? Aside from the fact that I am sitting up here at 9 pm eating KFC's popcorn chicken, biscuit, mac & cheese & gingerale!!!! Okay- aside from that, the real reason is that I have not been able to be consistent!! I can drink a lot of water... that's not a problem. It's the eating and the exercise. I have a membership to Curves, but I can't even remember the last time that I was there. And I LOVE food!! When it comes to eating, I am lucky that I am not a whole lot bigger than I am!! I love Dairy Queen and pizza and what ever else I can get my damned hands on... I'm greedy and it's so sad.
I was talking to my girl last weekend and she was telling me about the this program called Dr. Natura. I'm not going to go into an ton of detail, but if you're remotely interested in improving your overall health, check this site out. The information is very interesting. I'm not suggesting that you try it, I'm just saying read it. I've already ordered a 60 day supply and I'm going to be starting on Tuesday. Ill keep you posted on my other page. I'm sure most people don't want to hear about all my shit. HA!
I don't know what to expect, but I'm taking it on as my own personal challenge. I don't think I have stuck with anything - consistently- for 60 days. Well I was working out at the Y once for about a year straight.... Ok, so that was the only time & that was about three years ago. SO this is my new challenge.
I don't know how many people have ever tried anything of this nature, but this is supposed to be some intense shit - literally. HA!
Anyway, what is the longest span of time that you have consistently stuck with a program/goal? What was it? & Did you accomplish what you set out to accomplish?