Useful Less Common Windows Tweaks
A better googler than I (namely, Dan of Carputer fame) forwarded these links to me, which I used to tweak my Windows XP + Installed Applications (because its really one big organic entity) to a better state. I hope they help someone else too.
This one isn’t too uncommon, but the info there gave me a much better understanding of where to look in the registry to accomplish what I wanted: Customize the right click context menus
More uncommon (and also very cool, imho): Edit the Places bar locations in Open/Save As boxes
Cheers!