1) Pick a new up and coming language or framework. Something like elixir or pheonix or something else that is really hot and just starting out.
2) Learn it. As you learn, write a series of really awesome tutorials and articles on your blog about that stack.
3) Help people out on SO and other forums that talk about that tech. Point folks to your posts if it looks like it might help. Add your blog to your profile page.
4) Try to guest on some podcasts about this same technology, or maybe even create your own podcast.
5) Keep doing steps 1-4 with constancy and over time your luck surface area will grow and new opportunities will come your way.
When you start contracting in that tech you'll be able to charge much better rates than your old rate because you will be a thought leader in that space.
Also, you will be able to capitalize on sites like airpair.com
Hope this helps!