Week #1 was drinking water. I think it was 60 oz a day, but it may have been 48 (sorry, I'd have to look up the thread again). Last week's challenge was to exercise for at least 30 minutes a day 3 days of the week.
If you haven't already, join us in the newbies and buddies thread. We are all new to the site, and the group seems to grow every day