Public communication, both verbal and written, tend to be broad requests or even pleadings for members to help. These requests can be presented in your post newsletter, verbally in a post meeting or through web sites and social media. An example would be, "We have a big BBQ next month and we sure could use a few more members helping out." Seldom does this request produce the desired result of more people volunteering to help. Public requests for members to become active just don't work well, very often.