I weigh in on Sunday mornings for the WISH check in thread, and then again on Wednesdays for the Spring Challenge check in. That works well for me, it gives me an idea of how I am doing about half way through the week, although if I am honestly on plan (which I have been since 1/5) I know that I am doing fine, even if I have a temporary water weight gain. (None yet, but am expecting it this week due to TOM). Two times a week is enough for me. I have even thought of doing less often, like once every two weeks or so. Perhaps when I get closer to my goal.