If you have a Twitter account you can have your blog automatically tweet about your blog posts each time you publish them. Here's how to set it up.
The Twitter Authorization form will appear in a pop-up window. Enter your Twitter username and password and click the Allow button. After a moment the Your Other Accounts page will refresh and you will see Twitter in the list.
Now it's time to set the default. Click on Blogs in the green bar at the top of the page and select your blog from the list. Click the Settings tab. Click on Sharing in the left sidebar. Turn on Twitter under Publicize Defaults:
My new book, Guide to the New Typepad is packed with tips and step-by-step instructions just like this.