WordPress 3 comes with integrated menu management. Although still a bit quirky at times, it makes creating and managing (navigation) menus a breeze. However, now that creating and displaying a menu takes nothing more than one line of code (wp_nav_menu), we appear to have lost the ability to "manually" add our own stuff.
On many sites these days, you will find a standard text at the bottom of all WordPress posts, for example the one you can find at the bottom of this post.
There are several ways to add content to your post, without having to do so manually. I will discuss three possible solutions, I would love to hear your preferred method, and why.