I've prepared a 38 minute tutorial on creating an Android chat application using IntelliJ Idea Ultimate 12. In my screencast I highlight the visual designer, code completion, live templates, local VCS, Subversion support and other features.
In this screencast you see how the JetBrains MPS plugin for IntelliJ IDEA enables the powerful concept of function memoization to Java methods and functions. It might inspire you to create your own Java extensions and ease your life as a Java developer.
This screencast demonstrates how to create Spock testing specifications. It covers creating basic when/then blocks, given/when/then blocks, expect/where blocks, and data tables. It explains how to create Spock file templates and Spock Live Templates for IDEA.