How to write and publish a post
1. From the Dashboard, go to Posts > Add New in the menu on the left. Or choose Post in the Add New dropdown in the toolbar at the top of the screen.
2. Add a title and content to your post. You will notice that many of the formatting buttons look similar to those in common word processing and email software, and work the same way. Simply highlight the text you want to modify, and click the appropriate button to change the style of the font or formatting of the text. If you only see one line of buttons, click the button shown below for additional formatting options.
3. Images, audio, and video can be included in the post using the Upload/Insert buttons at the upper left of the Text Editor. Detailed instructions on adding various types of media are covered here (images), here (audio and video), and here (documents).
4. To the right of the Text Editor is the Publish window. WordPress will periodically do an auto-save, but it might be a good habit to click Save Draft every now and again to ensure you don’t lose anything. You can also choose Save Draft if you’d like to close your post and continue working on it later without making it visible to the public. If you’d like to see how your post will appear to users before you publish it, you can click the Preview button.
5. Privacy settings are determined by the post’s Visibility. Clicking on the Visibility Edit link in the Publish box will allow you to make the post 1) public and accessible to all users, 2) Password Protected and available only to users who enter a password of your choosing, or 3) Private, and accessible only to users who have editor or administrator access to your blog. Students should check with their professors before making a post private.
6. Consider choosing a category for your post, or attaching tags to it, to make it easier for readers to navigate in the future.
When you’re ready for it to go live, click Publish.
7. After you publish your post, you will see a notification that it has been published and you can now view the post, or navigate away from this screen without losing any of your work.
- Creating and Using Posts (WordPress.org Codex)