Augment your community activity with the best resources possible.
Flood your community with terrific resources. Your community should be the single, greatest, source of wisdom in your topic.
By running a community, you can see the questions which most frequently appear. You have a unique insight into what your members need. Every question which gets a big response (or appears the most frequently) can be the basis for a terrific, new, resource.
If you're just starting out, there is often plenty of copyright-free resources you can include in the first place.
There are usually a lot of links to interesting reports, embeddable videos, and advice you can curate into a single destination for members. Add your own material to this advice. Pay a few of the top people to add their resources here.
Do whatever you can to have the greatest collection of those resources online. It's easier to ask members to add to existing material than it is to develop material from scratch. The more material you have, the easier it is for people to recommend the community to other people.