Was going to say basically what the poster below said... there have been weeks the scale did a backflip, let alone didn't budge.!
I make sure to weigh myself first thing (after bathroom) in the morning for lowest possible weight (it makes me feel better ^_~). If for curiosity I weigh myself around 6pm or so, I sometimes see an extra 5lbs some days (specially if I weight myself not too long after eating) -_-;
TOM always gvives me at LEAST 2kg (4lbs) increase starting from a couple days before it comes. And I've noticed that as I lose, the scale seems to go for bigger and bigger fluxes at the time. Back when I was 180 or so, I never noticed an increase. Now, the pants get tighter (or I have to change to bigger ones), the scale goes up, etc -_-;
I've found that logging my weight once a week but *checking* every morning help me. I'm even contemplating logging it each day since I check it anyway. Sometimes the day I log I'm up a pound or two from what I was the day before, and knowing its not that I've not lost anything (looking at the previous few days) helps me write down the higher number without getting too disappointed.
| current weight: 150.0