Make sure it can still be read when it is reduced in size.Many groups make their Logo much longer than its wide it then becomes a full banner advertisement and takes up more space when its listed on the group page giving it more prominence.For Ideas look at the groups that have grown to over 1000 members and compare the names to those that that are still stuck at around 150 members.
2) Pick A Graphic That Captures The Essence Of Your Group A picture speaks a thousand words, does the image you choose convey the essence of your group.
Get a striking image and then use photo shop to add some text on top of the picture.
Like a crowded house party that ends up with lots of people milling about on the front lawn.
Anyone who drives down the street will always know which house to go to.
3) Leverage Your Friends You can’t grow a group huge without the help of other people.
Groups go viral because people invite their friends to join.
5) Create A Whisper Campaign Tell your friends about the group in an indirect way long before you are going to launch, hint about it in blog posts, in teleseminars and in wall posts and in all your communications with your potential core members.
Get them excited and they will start to talk about your new group even before you open the doors.
Create the content for your group before you launch and tell people what you are doing.