I've started playing around with Google Apps this year for our English school. It's really helped us out alot. So, I've been reading up on these resources and just wanted to share a few that have really helped me.
Google Apps Education Training Center - Get info straight from the horse's mouth if you really want to know how to get the most out of these tools.
iGoogle As An Oganizational/Educational Tool - I started playing around with the iGoogle page to organize all my stuff. Then I read this post and got several more great ideas.