Good documentation doesn’t come easy
Documenting source code is rarely something a coder likes to do. I’m just as guilty as anyone else. I know it’s a “good thing”, but my natural inclination is to code first and document later. Sometimes later comes so late that it’s a chore to get it done. I’ve been forcing myself to document as I go, and it usually works out pretty well in the end.
I’m a control freak
What’s made this process easier for me is to completely dump the notion of auto-generated documentation (I’m looking at you, javadoc, jsdoc, yuidoc, ruby-doc and the like). Instead, I favor writing the documentation for a given piece of code with markdown.