Wikipedia:Tip of the day/July 25, 2007
Remember, always sign your messages
Signing your posts on talk pages prevents readers from getting your messages confused with those by other users. Therefore, it is considered proper "Wikiquette" (WI-kee-ket) to sign your comments on talk pages. To do this, add four tildes (~~~~) to the end of your message. When you save the page, these will be converted to your signature followed by a date stamp. To sign without a date stamp, use three tildes (~~~) instead. The default signature for your account is your username, but you can customize it in your preferences menu.
Read more: Wikipedia:Sign your posts on talk pages