Texas Wikipedia information page Categories are a vital tool for navigating Wikipedia. When categorizing pages: DO: Use the most specific categories possible. Categorize based on defining characteristics. Add pages to multiple categories in overlapping trees. Provide sort keys or a {{DEFAULTSORT:}} key. Add cleanup templates where needed. DON'T: Don't add pages to non-existent categories. Don't categorize based on trivial characteristics. Don't add pages to non-neutral or unverifiable categories. Don't categorize fictional subjects together with real ones. Don't apply maintenance categories directly: use templates. See also Simple rule set Simple style manual Style tips Wikipedia dos and don'tsEncyclopedia content Accessibility Biographies Biographies (living) Categorization Disambiguation Images Leads Links Lists References Tables Titles (of articles) Collaboration Consensus Talk Simple rule set - Simple style manual - Style tips - Wikitext cheatsheet