OK, I'll bite. 'Code' for me, at the moment, is a web app in beta that needs functional and cross-browser UI testing.
So until I script all flows into Selenium, twill, windmill or something else, and until I can figure out how to automate screenshots of all screens in the OSs and browsers I care about (http://stackvm.com ?), I have checklists, and I go through them manually.
It helps that my web app's UI is short and sweet, but that's probably because I'm trying to avoid thinking about the combinatorial explosion it's hiding.
^5s