I can't really offer any quickie advice in 3D other than study your favorite 3D animations repeatedly and then pick which application you want to use and do the tutorials faithfully. There are many publishers who offer great books for new users to many different 3D applications. Maya offers The Art of Maya for example. (www.aw.sgi.com)

You may want to follow 3D user sites and newsgroups. They offer some really good 3D advice and tutorials just as Flashkit does for Flashers. Try http://www.highend3D.com or http://www.the-gnomon-workshop.com/title.shtml to get started.