Build apps and services that use data from Moves, the awesome iPhone app that passively tracks you throughout the day.
I used to maintain a wiki full of personal ideas using DokuWiki, but at some point just gave up with wiki syntax entirely. A few months ago when I was moving all of my sites and content over to a new server and trying to consolidate things as much as possible, I decided to import all of that old content into a WordPress install (which was actually a single site within the same Multi-site install that runs Dented Reality). I ended up writing the following super-rough script to just scrape the contents of the pages and throw them into WordPress. Scraping the pages meant that I could get the actual output of all plugins etc, and also get full links between pages.