One of my few gripes with WordPress has been the absence of easy linking to pages and posts internally. Fortunately Aaron Woods has come to the rescue.
I’m not sure why I ddin’t find this sooner but if you are looking for a quick and easy way when writing a page or post to link to another page or post, try Aarons RB Internal Links Plugin for WordPress. It adds a quick and easy button to the WordPress visual editor which opens a window allowing you to quickly navigate though your pages and posts drilling down to the one you want to link to.
While I can see room for a few improvements Aaron did a great job and hopefully the functionality will eventually make it into the WordPress core. This is definitely the kind of thing that deserves to be there.