Wikipedia:Tip of the day/November 20, 2008
It is proper "Wikiquette" (WI-kee-ket) to sign your messages on talk pages. When you edit a message, at the top of the edit box is a row of square buttons. One of them looks like a signature (). When you click on it, it inserts the signature code (~~~~) wherever the blinking cursor is. When you save the page, this code is converted to your signature followed by a date stamp. You can also type in the code manually. To sign without a date stamp, use three tildes (~~~) instead.
Bonus tip: you can customize your signature in your preferences menu.
Read more: Wikipedia:Sign your posts on talk pages