Some useful links:
Write a new post: http://howardzhao.wordpress.com/wp-admin/post-new.php
Change your blog’s settings: http://howardzhao.wordpress.com/wp-admin/options-general.php
Choose another theme: http://howardzhao.wordpress.com/wp-admin/themes.php
See what others are writing about: http://wordpress.com/tags/
If you’re just getting started, there are tons of helpful resources available and easily searched for on our support site and forums.
http://en.support.wordpress.com/introduction/
Learn WordPress. Tutorials and Walkthroughs: http://learn.wordpress.com
More Frequently Asked Questions: http://support.wordpress.com
We hope you dig your new blog. If you have any questions or comments, please let us know!
http://support.wordpress.com/contact/