To Post you article click on the Submit Post link in the sidebar.
Give your post a title and start writing your article. Once you’re happy with it you can submit it for moderation. If the moderators don’t see any obvious problems with the article, they’ll publish the article and it will appear in the blog.
Once you article has been submitted you can go back and edit it by clicking on the “Dashboard” link under “My Content“. There you will see the current status of all your submitted posts and have the options to edit or delete them.