Well, a few months ago I was working on a little JS library, a small jQuery type thing, but I haven't touched it in a while.
I've been fiddling with my personal branding as well, mostly graphic (logo, website etc.), but it's so hard to design for yourself :( I've got a few new ideas I want to work out, mostly HTML/CSS though. From there I'll see if it works :)
It's always fun to just fool around, even if it's just with HTML and CSS, just to test things out if it'll work. Even if it's been done dozens of times and there's loads of tutorials, just fiddle around :)
I'm hoping to have a bit more time later on in the year to do these kinds of things though, I miss it :(