Without telling people what will happen with them, have each person write down on a piece of paper anonymously one of their problems, a frustration, something they are currently worried or concerned about.
Ask them not to make them incredibly personal.
When done, have them crumple up the paper and throw it. The facilitator will then go pick up a couple of the crumpled pieces of paper, open them up and read them to the group. The group will then brainstorm to offer solutions on how this difficulty or problem can be rectified.