I was recently invited to be a part of a chat about Groups and exposure because of my involvement with PhotographersClub and it motivated me to type up this list of things that can help to make your deviantART group (more) successful.
Please bear in mind that my views may be subjective as I'm speaking from personal experience. It may also vary from group to group. Hope you find this useful!
My (personal) little list of Dos and Donts:
DO: Think before you create! Before you create your group, you need to really analyse a few things. Can the community benefit from my group? Are there already many groups like the one I have in mind? Why do I want to create this group, what will the goals of my group be? Do I have enough time to dedicate to running the group?
DO: Make your group different from the rest.
Do you want your group to be just another dumping ground for random artwork? Are there already many groups