The link of the day is: What Works in Software Development
(Or - How To Be Lazy Without Really Trying
HTBL is, essentially, an agile methodology for one person.
Mike Schwern is one of the perl QA Gurus; I took HTBL from him in 2003 at the Open Source Conference, along with Test::Tutorial. I use his definitions for 'test' and 'unit', which do not exactly have universal acceptance.
But they are good ...