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.
Sometimes Wikipedians sound like they are speaking in a foreign language, even when they are not. This is because Wikipedians have created a great number of specialized terms (jargon) pertaining to Wikipedia and the activity of Wikipedians. Fortunately, being the encyclopedists that they are, they have also created a Wikipedia Glossary to explain these terms.
Remember, actual encyclopedia articles should be written in jargon-free language which is readily understandable without specific knowledge of the Wikipedia project.
You know normal links—they look [[like this]]. But did you know that you can use normal links to pages on any other wiki? This is called InterWiki linking, and applies to all wikis, not just Wikipedia's sister projects. You can link to a page on MeatballWiki by typing [[MeatBall:PageName]], for example. See Interwiki map.
However, links to Wikipedias in other languages are done a little differently. You can link to these by typing, for example, [[:de:Hauptseite]] (replace "de" with language prefix). The colon at the beginning prevents the link from becoming an interlanguage link, which shows up in the left sidebar.
To hide the prefix from the link, use the pipe trick.
Bonus tip: the same basic syntax works in the search box. (Try typing in Meatball:)
For a listing of current collaborations, tasks, and news, see the Community portal. For a listing of ongoing discussions and current requests, see the Dashboard.