Best Time for Weigh Ins

First thing in the morning, naked (or in underwear only), after going to the bathroom and before eating or drinking. It is going to vary a bit sometimes anyway, though, for reasons like water retention and issues of how much 'stuff' is in your system relative to your bathroom habits. ;-) What's most important is to keep track of the trend over time. Sometimes I'm up a lb for a few days b/c of working out harder than usual, I just know not to let it freak me out b/c it's only water weight and tends to fall back off after a couple of days or after a day of rest. I only track my lowest weights, although sometimes I will wait until I get that lower reading a couple of times before logging it. :-)

First thing in the morning, naked (or in underwear only), after going to the bathroom and before eating or drinking.

I would modify that to suggest drinking 8 ounces of "something", whether that be water, coffee, tea, what have you. Reason being that you tend to be dehydrated in the morning so, while doing so consistently will give you a comparable number, a number that shows a more normal state of hydration would be more accurate.

For reference, remember "a pint is a pound".