Give people a reason to join you. You, you, and not the other clan that's exactly alike but bigger and better.

Having a great members that you can trust and have fun with, will always attract new people, and going in-game will also show the potential of the clan will build popularity, respect, and great members as well as a well developed clan. You can build your clan presence in the community by beating stronger clans, and hosting tourneys, and inviting good players. And soon enough you will be attracting even more, and skilled players, and becoming the dominating Clan.

I just goto the ultimate servers looking for people without clans.