Others are able to do that better than me. Here's a link to an interview with Mark Driscoll, pastor of Mars Hill church in Seattle, a congregation made up mostly of young professionals in their 20s.
Now, personally, Mark Driscoll is not one of my favorite preachers. He can be pretty abrasive and sarcastic with those who don't agree with him. I have to hand it to him, though, he is a hugely effective communicator. He does a great job here of giving a clear, concise summary of what the Christian message is all about.
Here's the link: