All-in-one is probably the most successful and most used SEO plug-in with WordPress and because of this, we added it (along with 5 other plug-ins) to every WordPress Express blog install.
All you need to do is log into your WP-Admin control panel, and under the "Plugins" tab, click the Plugins link.
You will be brought up a menu including all of your downloaded WordPress plugins. If you just did a fresh WP Express install, you will have 6 plugins in there. You want to "Activate" the All in One SEO Pack as shown below.
Upon activating, you will see the following settings options. You want to Click the "Options configuration panel" to set-up your permalink settings.
You will be taken to the options page. Leave everything as is, except instead of using the default "|" in between the titles, you are going to use a "-" as shown below.
Scroll to the bottom and click "Update Options".
It is that easy. Your blog is now set up to create links and meta tags that are much more desirable to search engines like Google, Yahoo, & Bing.
As you can see in your browser, the page titles have been updated...in this case, for my CraftyContent.com site.