(Updated 15 Dec 2020 with correct completed status!)
Investigate Maven 2 for builds Have a glance at TestNG unit testing(completed 2013) Potentially play with JMock for current testing framework(completed ~2009) Play with GWT.(completed 2009-2013) Sign up for Pragmatic Architect event
- Check out JavaBlackBelt site - what is provided, and what are the feelings of professionals (or, more importantly, recruiters) towards these qualifications?
Look into getting Visual Studio .NET again so you can have a go at GUI development in it.(completed 2011)
- Go to technorati.
Investigate JUnit 4 changes/improvements.
(Update: 15 Dec 2020: Huh. I did OK with these over the following decade...)