Bradford has some good points. I usually tell my clients not to worry so much about it and maybe weigh them once every 2 weeks is usually good enough. I like for them to focus more on their overall progress and not been stuck on how much they weigh. The problem is that even if I tell them not to get on the scale any sooner than that, they do it anyway. Body fat is more important than total weight. Also how their clothes feel and look is another way to measure progress and the most important one is how they feel regarding their energy level, mood and overall state of mind.