Weekly weigh-in & I lost zilch. Ugh!

It happens. Don't get discouraged. Weight loss is not linear and most likely will not go down every week. Make sure you are eating enough, working out, getting your water, limiting your sodium and ensure you switch things up now and again.

I lost 3lbs 2 weeks ago, and havent lost the monday just gone. Some weeks il lose 1lb every week, then il lose 2-3lbs and not lose for 2-3 weeks. I agreee its not a linear thing, your body doesnt think "oh its been a week, il let go of this lb"

Bright side...you DIDN'T gain this week! It will come off. Just don't give up!

I log my weight every single day. It's a zig-zaggy line, and I get to see where it's "trending", rather than focusing on a single snapshot of it. If one Friday is a valley and the next is a peak, but over all I'm zig-zagging in a downhill direction, that's much more encouraging for me than if I had only those two Fridays plotted on my graph... which would most likely look like I'd gained!

I'm kind of a mathy-thinker, so my feeling is always "the more data, the better the picture."

See also: http://www.webmd.com/diet/news/20051118/daily-weigh-in-may-help-dieters-lose

This describes me pretty accurately. I see a lot of these threads about how often to weigh and it is mostly personal preference, but I feel like those of us that get a lot of data points are more aware of where we are. On most days I weigh the least first thing in the morning after using the bathroom and before consuming anything. But that isn't always so and some days I weigh more than the previous day even though I am sure I had a calorie deficit. It doesn't bother me because I see that bouncing around but trending down. If I only checked once a week and one week saw what happened to be toward the low side of the current reading range and the next week happened to be toward the high end, I might think there was no progress or even a gain. If you would obsess and keep trying things and weighing again, then it would be bad to weigh often.