Well, when I started my plan (AGAIN), I hated the scale (still pretty much do

) but I weighed myself once a week. Then I got VERY excited as my body lost a pound a week. I was so excited that I wanted to check everyday. I got obsessed with it and wanted very much to just keep it under once per week. Fortunately, my mood and the way I ate wasn't affected by this. A long time ago I used to be affected, but not anymore. I know a weight flux could be due to water weight, soreness, TOM, eating too close to bed time, or not getting enough sleep or water. I put that into account. The only time I freak out is if I'm stuck with the same number for more than a week.
I guess my excitement eased up and turned into frustration ("how long is this weight loss going to take?!"). I didn't care as much. And now I only weigh myself if I feel a strong need to or if I notice a change in my body. I also keep measurements to make sure I know my plan is working. I weigh myself maybe two or three times a week now.