Tip of the moment...
Wikipedia banners and buttons

One way to raise awareness of Wikipedia is to advertise it on your websites with Wikipedia banners and buttons, like this one:

Copyright: Please note that most of these make use of the Wikipedia logo which is not GFDL, but is copyrighted by Wikimedia and licensed as CC-BY-SA 3.0.

See also:
{{Wikipedia-adnavbox}} Wikipedia ads  
To add this auto-randomizing template to your user page, use {{totd-random}}
List the things to do for an article

If an article has a number of tasks to be handled that are community consensus, you may insert {{todo}} (including the four curly braces) at the top of the article's talk page, and edit it to make the tasks more visible to the public.

Read more:
To add this auto-updating template to your user page, use {{totd}}