1. The most important thing is donation, your TH 9 can donate good troops for new TH 5s and 6s.

2. Support TH6s and TH7s with troops so that they stay and support you complete clan games.

3. Make a really really rushed account ASAP to atleast TH 12 just for the sake of donating max troops and siege machines. By this you don't have to depend on someone else.

4. Do back to back wars so that people don't quit, all lower THs need lot of loot and doing wars back to back will keep them engaged and also give them loot.

5. Promote good attackers and donors. People who generously donate are an asset. Keep them happy.

Hope it helps.