NOTE: This thread listed many forum shortcuts but the info was all over the place so I rewrite it completely to make it easier to read.<br>
<br />
<table border="1">
<tr>
<td><b>Description of shortcut</b></td>
<td><b>Shortcut</b></td>
<td><b>What it does</b></td>
</tr>
<tr>
<td>To link to a Wikipedia user page</td>
<td></td>
<td>http://en.wikipedia.org/wiki/User:Jimbo_Wales</td>
</tr>
<tr>
<td>To link to a Wikipedia article</td>
<td></td>
<td>Wikipedia</td>
</tr>
<tr>
<td>To link to a Meta page</td>
<td></td>
<td>[[m:Metawiki]]</td>
</tr>
<tr>
<td>To link to a MeatBall page</td>
<td></td>
<td>[[meatball:WikiPediaIsNotAnEncyclopedia]]</td>
</tr>
<tr>
<td>To link to a Wikitruth page</td>
<td></td>
<td>[[Press_reports]]</td>
</tr>
<tr>
<td>To link to a Wikiquote page</td>
<td></td>
<td>User:Poetlister</td>
</tr>
<tr>
<td>To link to an Encyclopedia Dramatica page</td>
<td></td>
<td>tl;dr</td>
</tr>
</table>
<br />
Also, there is a handy dandy BBCode guide.