My UserWiki, User:Abbydon, uses a lot of various includes. This helps me keep track of which ones they are and how they are used.
I originally got the tab layout from Demetress' page. However, I have made many changes to it, and I plan on doing more until I really like it. When I am done, I'll package it all up for others to use. Right now, it has a working name of UserWiki Layout. I'll give it a real name later.