1. a consisent monthly challenge that would start the first day of every month and end on the last day of every month. No teams, just individual members competing against themselves to lose the highest percentage of weight. Prize at the end? Hmmm I don't know.
by having it consistent, new members will know that if they join in the middle of the month, they only have to wait til the next month for the new challenge.
What's done on another site, is a monthly, stay on plan challenge.. it's done every month and the members individually compete against themselves to stay with their plan for the entire month... the prize there is an "award" for their signature.
2. A mid month quickie challenge, individual event, for whatever purpose.. that gives newer members a chance to join a challenge and not wait 3 weeks.
3. A 4 -6 week team challenge... that may have mini challenges in it.. (i thought the halloween challenge was fun because it wasn't just dropping weight, the exercise bonus points and other challenges in it were fun.. the frustrating part was the drop offs and chasing down people for their numbers)