I know that America is post-Christian in the culture and that many churchless people view the church as out of touch and judgmental. These were covered in great detail in previous Barna books.
The only new information I could find was the bit about advertising/promoting your church and how the ways don't work anymore.
For instance, churches shouldn't make unsolicited phone calls if they expect the average "churchless" person to start coming. The basic mailer won't work either. (Surprise, surprise. Most mail goes in the trash)
The answer, according the Barna's research, is to find a need in the community and meet that need. Maybe it's a matter of everyone know's the answer but nobody's doing it so they feel the need to repeat it.
I must be in the minority after reading this but this was not a great read from the Barna Group. It felt like rehashing the same data we've read before.
This book was provided for review, at no cost, by Tyndale.