I weigh maybe every other day, in the morning. I hate doing it that frequently, but it just happens. I've only been on SBD for 4 weeks, and my weighing hasn't discouraged me yet.
If anything, it helps. Like, if I have a bad day, and think I've really screwed myself up, I can't explain how much of a relief it is to weigh myself and not see a difference, or see a very slight one as a result of my slip up. I feel like it helps me maintain.
Then again, I'm a little weird.