Interesting. I've been restricting myself to weighing once or twice a week, on the theory that I don't want to obsess over minor fluctuations.

Yeah you gotta step that up if only for a bit to see otherwise you might think you've gained or lost weight that is totally illusory water weight! I can literally go up 10lbs in one day (I way 197ish) if I eat enough salty and carby food! If that was the only day I weighed myself in a week, yikes!