All the essentials are covered here. Version of Eclipse that you should be using, setting up Eclipse project files, getting started with existing projects and more. Go there.
See presentations of the features of Scala IDE. And follow along the Getting Started screencast, to be up and running in no time. Go there.
Frequently Asked Questions
What Eclipse versions are supported? Can I install more than one Scala IDE plugin for different versions of Scala? How can I increase the stack size? Find the answers to all of these and more, in our FAQ section. Go there.