I hope every parent and every single person aged 12 and up who reads this blog will listen to these messages. Here is a way to be biblically and radically different from your culture. This is cutting, convicting, wonderful, sobering, practical stuff. I can't stress enough the importance of the message Paul Washer puts forth in these three sermons.
There is a problem with two of the messages in that for some reason you don't get the whole thing, but there is enough of it there that they're still worth listening to.
Courtship, Part 1
Courtship, Part 2