A topic that has been discussed multiple times on this blog is Jewish Education. If you've read my comments, you know that I think it is the single most important factor in Jewish Continuity. Many of you parents also know how incredibly expensive it is.
Jewish Action, the official magazine of the Orthodox Union (the ones who put the little "OU" Kosher symbols on your food) has an amazing series of articles on the subject here. (they are in PDF format, but worth the download)