3 - Start a blog here. Blogs are for your personal use - they just have to abide by the simple rules that this site is open to the general public, so no racism, no adult content, etc - the usual.
Already got a blog on Blogger? (or WordPress, etc) Grab the RSS feed from your blog and post it in the RSS box located on your membership page. Just sign in and click on the "My Page" tab. Add the app called "My RSS" and follow the instructions in the box to paste your RSS feed(s).
4 - Your personal profile "my page" has text space to post info on your business, link to your Tweets, MySpace, Facebook fan page and more.