yup, I can see swings of several pounds in one day due to water retention or whatever. One extra salty meal can add a few pounds the next day. I agree that it's best to weigh at most once a week and if possible at the same time of day. I prefer Saturday morning, after one bathroom trip and before coffee and breakfast.
47 M 5'8"
May 4, 2010...... 440? lbs. (Start FitDay Size 60 Jeans)
June 19, 2010.... 393 lbs. (First Weigh-in)
June 19, 2011.... 229 lbs. (164 lbs. gone in one year :-)
Current Weight... 185 lbs. (Size 36 Jeans)
Next Goal 169 lbs. (07/04/12)
Ultimate Goal 165 lbs. (12/31/12)
The best exercises for weight loss are Fork Putdowns and Table Pushaways.