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.
When you transclude a page (that is, automate the display of a page's content on another page), all its tags (like {{TOCRight}}) go with it, which will be implemented on the host page. Just add the following code if you want to add a right-aligned TOC to a page, but do not want it to be displayed on "derivative" pages:
Communication between editors takes place at Talk pages.
To send a message to another editor:
Go to their user Talk page (e.g. User talk:xxxxx)
Click the "Add topic" button at the top and, when the editing window opens, you can type your message and a subject heading to your post.
At the end of your message, include your signature with ~+~+~+~ (~~~~ four tilde characters).
Note that user talk pages are publicly viewable, so it is not a private message to the user concerned. Even when deleted, the message is forever viewable in their History.
Editor replies: Unless the other user includes a link to your user page in their reply (called a Ping), you will not get a notification that they have responded, so it is a good idea to either check their talk page every now and then, or add it to your Watch list.
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.