I weigh every morning and night...only counting the morning weigh ins though. I find that I can fluctuate 2-3 lbs per day. It is discouraging sometimes, but I would rather know that it is a daily fluctuation than weigh once a week and be really disappointed.
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If you want something you've never had...you have to be willing to do something you've never done!
Instead of giving myself reasons why I can't...I'm going to start giving myself reasons why I can!
I weigh every morning (pee, strip, weigh) but only track once a week. I like to see the fluctuations, but only base my total weight loss on what I see on Friday morning. I find this keeps me motivated the best.