IMHO one key thing needed is to point out that Biblical Creationism is not just stupid, it's bad Theology. Creationism and its clone ID have been sold on theological as opposed to scientific grounds. They cannot stand on scientific merit and so have been sold using classic marketing techniques.
To counter that we must speak out in the pews, in the churches, online in the forums, school board meetings, PTA and in daily relationships, and keep pointing out why Biblical Creationism is bad theology. We need to stop worrying if we are going to offend someones sensibilities by criticizing their religious beliefs, and go ahead and say that they are wilfully ignorant, forcing continued ignorance on innocent children and perverting the message of Christianity, denying GODs will by not using the capability She gave us for critical thinking, and ignoring the one record actually written by GOD, the world around us.
Aslan is not a Tame Lion