Consider creating [[MetaWikiPedia:Template]] for text that is often used. Templates could be used to make menus, headers, and footers. The main WikiPedia use them a lot. For example: [[MetaWikiPedia:Template:H:f_Help|Help Footer]].
Some common templates here are:
*<nowiki>{{stub}}</nowiki> which marks a page as being a stub ans lists it in the [[Category:Stub]] page
*<nowiki>{{cleanup}}</nowiki> which marks a page´s layout as requiring attention.
You can use [http://www.jtidy.de/jtidy/ JTidy] to convert HTML snippets to Wiki syntax.