How can I start writing IT article? : <p>I am new stack overflow user.</p>

<p>I see that I can post a new question by clicking 'question' button.</p>

<p>But if I need to share knowledge,e.g., write some 101 tutorial.</p>

<p>How can I start writing it?</p>

<p>Which menu or link should I go to to post my article?</p>
