I'm one of those weird people who do weigh daily, but I keep track of my trend, rather than the number. Through my daily weighing, I can tell if I've eaten too many carbs, too much salt, not enough water, etc. There are days where I'm clueless as to what happened to make the scale go up.
Take your weight once a week if you're trying to stay away from the scale, only realise that the numbers tell you what's going on with your body AT THAT MOMENT, not an overall trend. But I'm a numbers geek like that; I like seeing and interpreting trends and graphs.
I read your blog yesterday, I should get back onto mine. It's a great cathartic tool that I've under-utilised. I even put a sticky note on my desktop that says "YOU ARE BEAUTIFUL and don't you ever forget it". I think I'm going to get going on that Operation Beautiful... what a way to make your day!