I've lost the weight I wanted to lose, and kept it off for almost a year. But I have not been "perfect". Yesterday just was not a "good" day, I was starving all day and the usual things that work for me, just were not working. So I ended up over, on my calorie intake.
BUT that was yesterday, and here we are, on a whole NEW day. Like Coach said, it's not just about the weight, it's about a healthy lifestyle. There are going to be slips and bumps and uh-oh's in the road. Maybe sometimes we choose to overeat. Maybe sometimes we don't realize how many calories something has in it, til after we eat it. Or we forget to track something we ate, til we're already over the range for the day.
The important thing (for me) is to not give up. Each day is a new opportunity to have another go. I try to learn from my mistakes.... sometimes it seems like all those years of crappy choices, are tough habits to break. But I refuse to stop trying.