http://course.pluralsight.com/camp/trailblazer/ Pluralsight has 36 courses available for free during its trailblazer event. If you have the time, I would encourage you to try out this offer and take 2 excellent Java courses: Understanding Java VM memory management This memory management courses offers a detailed refresher into the Garbage Collector, and covers some useful tools and techniques. The section on reference classes is particularly interesting, I had never heard of WeakReferences before. Java Testing Introduction This Java testing course is fantastic. I highly recommend it to every Java developer. They have flagged it as beginner level in this event, and it is short, but it is highly technical and useful. I've never seen a better introduction to unit testing. Happy course watching.