To keep myself sane while dealing with my work deadlines, I've found myself tinkering around with an idea I've wanted to try building for years now. Oddly enough, it's not yet-another-app, but a website (web service, maybe?). And it's actually something that's designed to be self-hosted. I haven't yet decided if it will (eventually) be open source, or if I might solicit feedback from friends (real and online) just in case it's more useful than I think.
Sometimes the idea for something new comes in a flash of inspiration. And other times (as in the current case) it meanders around in the back of my head for years - just waiting for the right moment or combination of external factors.
For this project, it's the result of the rebirth of the indie web movement, my long time interest in self-hosting and owning the tools and data I run my business with, and Apple's WWDC announcements about Safari and their OS's upcoming privacy improvements.