Joshua Paul points to two videos of online community authors, Richard Millington and Paul Resnick, as they share some of their tips.
Rather than send a mass email to your community’s membership, ask a small number of people for their expertise on a given topic. The more people who receive “the ask,” the less likely people are to respond. In the language of the actual request, don’t forget to highlight why the community member you are reaching out to is being asked to make a specific contribution. Bring up their expertise, experience, or past content that they have produced.