WordPress.com introduced a new feature called "Writing Helper," is a new box that appears underneath the edit box on the Add a Post Screen (the entire box can be dragged to the right side if you want it next to the edit box, instead of underneath).
First up is Copy A Post. You can now reuse the hard work of previous posts as the basis for the next one. Simply hit the Copy A Post button, pick a post, and we copy the title, content, tags and categories for you, saving you steps. If you often have similarly tagged or formatted posts, this'll save much time. You'll get your most recent posts in the list, but you can search by title too.
Next is Request Feedback. You can now share a private draft of a post with a friend before it's published. They can help you find typos, suggest improvements and give advice to make the post amazing before you publish it to the world.
When you click on Request Feedback, you can enter email addresses of friends who're willing to help. They'll receive a special private link to see your draft, where they can leave feedback on your post. Their feedback will appear in your post's Request Feedback area when it arrives, so you can make changes to your draft accordingly.
[Source: WordPress.com blog]