[chewxy]

What do you need/want now? If you don't have anything you need/want, I think that is a bigger problem than learning a new language.

otherwise: code what you want now.

[bblough]

I understand the desire to innovate, especially for many of the people on HN. But not having anything you need/want (i.e., you current tools meet your current needs), is a problem? Really?

[ghostdiver]

Real world tasks produce problems which are best medium for learning process.