Ignoring member fatigue
People get tired and busy. Ensure that you recruit enough members so that people can cover for each other when real life gets in the way. Plan for attrition by having a pool of potential members from which you can draw.
The nature of volunteering means that as personal circumstances change, so does the capacity for extraneous work. Unpaid roles are usually the first to go. Given the sometimes sensitive or difficult/stressful nature of the circumstance change, volunteers don’t always communicate their situation and tend to disappear off the radar. An astute community manager will be able to recognize this and intervene – two way communication is vital.