Heh, should have seen that coming.
I know I weigh myself way way way too much, but I do them at the same times every day and keep a fairly routine eating pattern, so it's usually very predictable.
Wake up, go to the bathroom, stand on the scale.
Get home from work, take off work clothes, stand on the scale.
Do P90X, eat dinner (this order is reversed sometimes), stand on the scale.
I just wish there was something else I could do every day to see exact measurements done quickly like a scale does. I have a good tape measure to get sizes on my biceps and thighs and stomach, but it's hard to get it precise.
Nothing beats standing on a flat surface for all of 3 seconds and getting an exactish measurement!
...too bad "weight" is probably the least important metric when working out to gain muscle, but it's still frustrating.
Don't think I'm messing up my food measurements, as I keep a fairly repeatable eating routine as well:
Clif's Builder Bar + Greek Yogurt for breakfast
14 oz of grilled chicken on spinach leaves with chick peas and fat free catalina dressing for lunch
Build Bar for Snack
14 oz of Skinless Chicken Tenderloins with some veggie side dish
Recovery drink after P90X (organic low fat chocolate milk)
A little give and take, but roughly 1700-2200 calories a day, never anymore more or less.