Documentation—if there is one word that instils fear in most developers, it must be this one. No one in their right mind would argue the value of documentation, but it is the actual act of writing it that concerns developers so.
As with everything else presented in the book, the secret of creating good documentation is to make the process of doing so as painless as possible, and if we are lucky maybe even attractive, to the developers. The only practical way to achieve that is to reduce friction. The last thing we need when we are in middle of fixing a bug is to wrestle with our word processor, or even worse try to find the right document to update.