From Extropia

Only one thing can reside in a category called "Templates", and these are the things that make Wiki easy! Setting a template up can be a complicated struggle for those new to wiki, so the best advice is to nick someone else's code. Feel free to use any of the templates here as foundations for your own, or look to the likes of Wikipedia for examples on how to do the more complex stuff. Just make sure that any templates we do make have "[[:Category:Templates]]" somewhere in the footer. This will keep them all in one handy place to refer to later.