1) Remove the toxic and negative people. They drive people away and kill engagement. My clan is super light hearted. There is banter and throwing shade, but we laugh and enjoy just playing together. The clan is curated with a bunch of sassy savages who can both take a joke and make a joke. You have to have the right kind of chemistry going on. 2) Keep it inclusive. Don't get into a mode where it's just the same handful of people doing things. Drop a message to everyone in your clan chat about what you're doing and allow open sign up. Making people feel welcomed and open to engaging is key. Also, help people. This isn't about "Doc needs something, who's coming", it's about "what does everyone need and what can I do to help". Be inclusive and thoughtful. 3) Be a leader. Don't just let stuff happen: make stuff happen. There is no question about who the clan leader is. I am vocal. I teach, I lead. I am the clan leader. I am the cult leader. I am the tyrant. As I've stated recently to my guys: I am your elected leader because you elected to become part of this team. You're my constituents in a way and it's my responsibility to do this thing right. 4) Grow your clan slowly. Make sure everyone knows everyone. You don't want a clan where people get on and are like "who are these people". Make it a brother/sisterhood. At the end of the day, clan engagement boils down to whether people want to engage with others within your clan. 5) Admins. They're important. I'm not going to want to be online all of the time. Yes, I main D2, but tomorrow may just be a Dark Souls kinda day. Next week may be an Overwatch kinda week. I may be playing golf all day Saturday and doing a cookout with friends all day Sunday. Having admins that continue your level of welcoming and leadership when you're not around is very good for the health of the clan. That's pretty much how I operate and it has been pretty successful thus far.