In addition to learning new technologies, you might want to think about how you will present yourself in interviews. Create a narrative for yourself. Techies frequently overemphasize their technical skills during interviews. "I know Java,
Servlets, Spring, Hibernate, blah blah". Problem is that there are 1000 techies who say the same thing. Many times what can make you stand out from everyone else is the soft skills that you bring in. A lot of techies undervalue their soft skills. Creating a narrative out of your work helps you "weave" those soft skills into your interview. It makes your interviewing skills got from a 4 to a 7
So, for example, when someone asks you "tell me about your last project", most people say "I implemented blah blah using dah dah technologies". That is fine. Everyone does that. It won;t make you stand out. Instead, if you use a narrative :- "When I started on this project, the employer was facing Dum Dum problem, and we decided to use dah dah technologies to implement blah blah. As a result of this, my employer got Zoom Zoom" Create a story. It doesn't have to be a business problem followed with impact. It could be anything soft that you did. Maybe you picked up a new technology. Maybe you trained someone else. Maybe you interfaced with non-technical people. Maybe you built rapport with the team. Anything that shows you are more than the run-of-the-mill "resource"
The thing is techies are really bad at creating these stories naturally. MBAs do this even when they haven't done anything :p. Once you do, it adds a lot of *pow* to your interview. It requires a lot of introspection to really think about what you did that makes you you. And I bet there is something that differentiates you from the herd if you think about it. You just need to spend time looking for that person that is inside you.
You have the time. If you already have a few technologies under your belt, why not spend it in enhancing your interviewing skills? Your interviewing skills will help you in every interview. Any technologies that you learn will help you only in interviews at companies that need that technology.