The three-letter prefixes are a convention I used sporadically in Groundhog Day, chiefly to identify posts dealing with specific topics...In the weekly Tinderbox meet-ups, I learned that a convention like this can help make text links to other notes quickly and efficiently.

This is a good idea, but I'm not sure I'll follow suit. Although some $DisplayExpression trickery with a user attribute in Tinderbox could be useful. Hmmm.