I weigh myself on the scale everyday. I used to get discouraged in the very beginning, but I don't anymore. As long as the scale doesn't go up, I am pretty happy. Of course, I am more happy when it goes down. I think the scale helps me get really nitty gritty about this whole process. If I do gain, for example, I try to think about what is going on. Did I eat something salty? Did I really eat enough calories to gain (this is never the case)? Am I getting my period? In the first couple of months after surgery, I was very discouraged and obsessed about the numbers on the scale. I even wrote about it in my blog. Over time, I was able to wrap my head around certain things like...I can't possibly gain a pound in a day (of real weight anyway). I could be getting smaller despite the numbers on the scale. I know you are aware of all these things because you are informed, knowledgeable and intelligent. With that being said, it is a process. Just because we know something doesn't mean we actually believe it yet.
I tried weighing myself once a week in the very beginning, but that didn't work for me. Seeing the daily fluctuations actually helps me understand what is going on with my body.