Also, I started to gather a reading list on technical writing not for completely new projects such as books or blogging. But rather to improve how I communicate to my clients and collaborators. In concrete terms I want to write better documentation and specifications for the projects I'm building (typically custom web apps for SMEs).
Then there is also a synergy with my part-time teaching job. Writing better handouts, structuring assignments and so on.
Perhaps some build off each other, but I'm sure you understand every hour of technical writing you do takes away from building an animal sanctuary.