More projects that didn't get listed above:
Offline Blog Entries
Since the service worker stuff for the Sleep Tracker works, I should start looking at all the other phone apps that have got backed up in the queue. (See also: Shopping List below). I'd like to think that adding an offline mode to the blog would be easy, but I've got a feeling that I made the entry submission stuff far too complex (although I might be thinking of Chat).
Shopping List
The classic phone app. An opportunity to use Notifications and Push API, and a bunch of other stuff. I dunno. It's the sharing stuff (and I guess the sync stuff, although there are ways to do that).
Slow Movies
Since I've got £60 to spend for my birthday, I could buy the hardware for this and get something up and running. [Pause to check the website] Yup, within my budget