A bit late but I still feel it's worth keeping track...
2017 has been different to previous years. It wasn't so much about learning new tech and tools as just getting back to basics and doing things better.
In the world of Angular, and starting to explore the more recent versions, I've got used to using components. As a front end developer/designer it's been great to be able to build a small standalone snippet of HTML/CSS in CodePen. By having it small and isolated it makes it easy to test in browsers, linting tools, accessibility tools, etc. It's like unit testing for functions.
I came to Sass very late but it hasn't taken long for it to become the norm and writing standard CSS now just feels weird and like hard work.
In the last couple of months I've made a conscious effort to improve accessibility. I've started using aXe accessibility checker and guidance from the Accessibility Project site, a11yproject.com. It's a big area and an important one so more about that in another dedicated post.
I've dipped my toe into the waters of cross platform development with Xamarin. It allows you write code in C# and export separate versions for iOS, Android and Windows. There's still some platform specific quirks but it's about 90% reusable and the framework makes it manageable. It now supports some CSS too as well as it's own style rule syntax so should be easier.
Final one on my list is that I've now got Illustrator. I don't really know what I'm doing yet, still Googling each new thing I need but it's an amazingly powerful tool. It's been great for creating alternate versions of logos, converting PNGs to SVG and optimising existing images.
I'm not sure what 2018 holds. I think I might actually start doing some training, focusing on HTML and CSS.