How to create a new page
In the searchbox, type in the name of the article you wish to create. When told that the page does not exist, click the link either in red or with the question mark.
You can also type the title as the URL in your browser's link field and get there directly:
http://en.wikipedia.org/wiki/Article_name
Perhaps the easiest way to start a new article is to follow a link to a page that doesn't exist yet. Depending on your settings, these links may show up as red links or have a question mark at the end of the link (red links?).
Read more: Help:Starting a new page