Expect it to be very messy.
A geek would not be much of a geek without a page describing their ComputerHardware.
PetRabbit collects information on owning rabbits as urban pets
SSD has information on configuring a Linux desktop to work best with solid-state disks
Zeroconf has some tips and tricks for using zero-configuration networking under Linux
Apartment is a braindump about sharing chores and expenses with my apartment flatmates
Facebook documents various things about the social network, mostly at this point about their egregious treatment of user privacy
Java various tidbits about Java
OpenStreetMap are pointers and information resources I use for mapping
I collect quotable Quotes, a page which functions as a staging area till I import them into my quotes database (ever wonder what powers the quotes at the bottom of my e-mails?)
Braindump (or rather, browser tab dump) of working with the hell that is GNU Mailman
Lists of things
Wikis are great for keeping lists of things. Some lists of things I am keeping:
DebianChecklist is a checklist for configuring new Debian-based systems
DotFiles contains configurations for programs that I use.
GNOMEIsAntiUser contains list of various reasons GNOME sucks (with references), which I use as a reference when people force me to start trolling about how GNOME sucks
ProseSnippets are pieces of text I thought were written particularly well
TEDTalks are notes and summaries of TED talks that I thought needed to be jotted down
TitleIndex lists all the pages on this Wiki, many of which are not linked to from the FrontPage
Wines contains a list of wines/other alcoholic beverages I've found I like, and need to purchase again