Deployment is critical in volunteer ministry . I know some churches that do a good job of training. The people are never deployed in ministry. There is time for training to end and work to begin. To have people involved in meaningful ministry is critical to the recruitment of other people for ministry.
Celebration is important in recruitment .
You generate what you celebrate. Have a banquet for the volunteers who give special times for ministry. Have a time of dedication in worship for those workers who give of themselves. Honor a volunteer of the year. Do things to lift up and affirm those behaviors you wish to emulate.