Wikipedia:Tip of the day/October 26, 2006
It is proper "Wikiquette" (WI-kee-ket) to sign your messages on talk pages. This prevents readers from confusing your posts with those by other users. To sign a message, move the cursor to the end of the message, and then with your mouse click on the sig icon () in the toolbar at the top of the edit box. This inserts the signature code (~~~~) where the cursor is. You can also type this code in manually instead. When you save the page, the code you inserted will be converted to your signature followed by a date stamp. To sign without a date stamp, use three tildes (~~~) instead.
Read more: Wikipedia:Sign your posts on talk pages