Dear A.,
Thank you so much for bringing up this topic. It is one I struggle with. I am looking forward hearing ideas from others. Here is my suggestions. People seem to be fearful of stepping into a situation that will be to big to say "no" to later, or worry that they will not be able to perform the task successfully-- so they don't even try once. Here is what has worked for me:
-- I have good luck asking two friends to volunteer for the same task (or two tasks) so that they can do it together.
-- I have broken down tasks to things that can be done at home or to things that are under two hours at the school or church. If I am leading a group I always feed people and allow them to bring their children.
-- I follow up with the volunteers after an event to thank them and get their feedback. People love to be listened to. This small action helps me know them better and contact them next time.
Everyone is busy and guilt does not work. No one will want to join a party if everyone is complaining how busy they are. As a leader, stay optimistic and if you can't, maybe you need to sit an event out. Burn-out can catch up with you very quickly and it is important to read the warning signs. Cancel an event if you don't get enough volunteers -- this will wake up the sleeping parents who think that someone else will always step in when they should.
Best of luck!
Kelly J
Oakland CA