Ask HN: What are your tech/programming 'bets'?

What technologies are you currently interested in that you think will be useful in the future?

I'm currently at a total loss for what to pour my time into. I'm working in a low-end support role, having done development on the side for nearly 4 years now. Primarily for the web - I've done development and built toy projects with a lot of tools - far too much to list (PHP - Vanilla/Symfony2, JS - Node/Meteor, SQL and NoSQL db's, lots of API integrations, experience with lots of IDE's and tools, etc).

But I find myself (4 years down the line) with basically no finished/polished public projects to call my own and generally uncertain which direction I should head in. I don't feel confident applying for any jobs since I as I mentioned, I don't have any public work to share, so my CV looks pathetic. The solution is obvious (build some), but I find myself changing my mind about the tech stack half way through and trying something else a lot of the time. I feel like I need to start being a master of one trade rather than jack of none.

There was a funny post (either on HN or linked to from HN) a while ago, of somebody trying to choose a tech stack to use/focus on, and that describes me perfectly. I can't get anything done for the overwhelming choice...

Whilst a lot of web-work is just CRUD, the web is shifting towards an expectation of realtime data or app-like behaviour. So naturally things like Meteor, or a combination of a backend stack with Angular/Ember with Phonegap look promising... but then for anything other than simple apps, the UX is still not quite there, so I look at native app development.. so Android or iOS.. argh!

Help?! How can I 'get shit done' and get onto the correct path to an interesting job in development?