I could list a bunch of tips, gotchas, etc. because I've made the switch several times. I've tried to make the switch to Eclipse several times but couldn't do it and went back to IntelliJ.
First tip:
Intellj "project" -> Eclipse "workspace"
Intellij "module" -> Eclipse "project"
Second tip:
Eclipse has the concept of "Perspectives" which means it reshuffles around your UI when you're doing different things, like for debugging there's the debug perspective. I don't quite get this, I personally prefer the concept of windows, or the tool windows that dock to the bottom or sides.
