I have listened to Stand To Reason for about eight years. Two hours every week and guaranteed to make you think. After eight years a lot of ground has been already been covered but I still try to listen because Greg usually has some great commentaries. The show from 6/18/2007 (very moving remarks on fathers) and the show from 7/16/2007 (good comments about raising children) are worth downloading.
You can read more about the radio show here or go to itunes and search for it.
There is also a blog here worth keeping an eye on.