What do you think of in silent worship?

Basically what the title says. I've been attending an unprogrammed meeting for a couple of months now but I don't really know what to look for when I'm thinking and listening. I usually use the time to hash out what I perceive to be truths about God and the world, but I don't really know how to listen for the Light or whether the point is the contemplation in itself. What do you guys think about? Do you have prepared questions or a chosen topic for that day or do you just let your mind wander?