I think the occasional challenge with daily check-in is nice, but every day feels (to me) like a lot, and there are already comms like writethisfanfic that do year-long daily check-ins. Maybe it would be fun to experiment with different periods, e.g. a challenge for a week or two to stretch ourselves, or finish an old WIP, or things like that.

Maybe weekly check-ins (since not everyone's able to write daily) for a challenge, or the occasional weekend challenge/"retreat" could be fun?

Whatever works for folks, though! :)