Ask HN: I have 10 months to spend. What should I learn?

Due to weird circumstances I have about 10 months with secured income without having to work. When the 10 months are over I need to get a new job.

Up until now I have been working mainly with UX/IA/Design, but would like to transition more towards web and/or app development.

I should mention that on the side of my day job I have launched a few Rails apps and also iOS apps, so I am not starting completely from scratch.

Things I am considering:

* ASP.NET MVC (Where I live this is requested from a lot of companies)

* Backbone.js / AngularJS / Ember.js

* Android development

* Swift (I will most likely look into this anyway)

* Or just deepen my knowledge in Ruby/Rails.

Any feedback and ideas on what I should focus are welcome!