Don't beat yourself up. I've messed up too a few times.... had Chinese food the second night, no really big meals since but a slice of cheese here or a spoonful of peanut butter there, maybe a soup that I didn't strain all the way that had a couple of potato chunks in it. I've done good with the shakes as well as taking my vitamins, and I have lost 8 lbs since the last time I was weighed (a month ago), so I celebrate those small accomplishments. Like the previous poster said, we didn't get to this point by being savvy eaters. Do the best that you can and make sure you don't eat the day before so you don't get sick. Good luck!