Using Post Formats:
Publish an aside post.
Publish a status post
Publish a link post
Publish at least one other post format post.
Sort through the various WordPress Themes on WordPress.com and test them.
Make a list or draw an “ideal” WordPress Theme for your blog.
Find a similar Theme on WordPress.com (as close as you can)
Publish a WordPress tip article using screenshots. If you need to publish code, use the sourcecode shortcode.
Find the first post on your blog, usually called “Hello World.” Edit the post slug to change the URL to a new title.