Here you can digest how to use Wikipedia, in bite-sized morsels. The tips listed below were created for the Tip of the day project, or the Styletips project, but are listed here by title and organized by subject area for your convenience.
There are two types of general topics lists: Outlines and Indexes. Outlines are arranged hierarchically, while the topics in indexes are presented alphabetically.
The vast majority of lists on Wikipedia present the items of a class of things – those are item lists. The rest are general topics lists which are different than item lists because they present the subtopics of a given subject – their scope is an entire subject.
For example, for sharks, the item list is List of sharks and it presents shark species. A general topics list on sharks is the Outline of sharks, and its scope is everything about sharks.