“ Creating too many new portals too soon can serve to dilute the overall subject area. Lots of similar portals with only a handful of works in each makes browsing and searching the portal-space tiresome and reduces the basic usefulness of an index. There is no minimum number of works for a portal. ”

“ The most appropriate way to categorise a portal is into the nearest equivalent category. For example, Portal:Physics should be categorised into Category:Physics. If there is no equivalent category, the nearest potential parent category may be appropriate until such a category has been created.
Subpages Subpages should use the template {{portal subpage}} and are automatically categorised into Category:Portal subpages (if the normal portal header is used, it will also categorise the page in this way) . ”

“ As with creating new portals, subpages should not normally be created if it will take material away from the main portal page or dilute the material in any way.
Non-works in portals Portals do more than just list works and they should be of use to both readers and editors. As well as works, they can link to and display any other pages and material on Wikisource. ”