Totally true, and expected when you think about it. Personally I found the hardest part was trying to implement changes all at once. A lot of people (myself included) try to alter everything at once, get rid of the crappy junk food and go hard on the cleaner stuff. However, it's all too easy to bounce back into bad habits. I found making small changes every week or so, much easier to maintain. So food remains the same, but replacing soda with water. The next week or two, eliminate something else that's not so great for you, and continue on until you've got a lovely foundation of healthy food you know you enjoy, and the things you've eliminated have gone out the window in such a slow and methodical fashion you don't realize until three months down that "I haven't had a coke".