One thing I learned from Jack Humphrey is to get a lot of microblogs pointing to your site. He calls this "buzzing". I thought this was a bit objectionable until I read the below. In short, it's fine with Matt.
Google's Cutts: Good directions drive traffic to your website - USATODAY.com:
"4. Create a blog and post often.
Cutts says blogging is a great way to add links and start a conversation with customers and friends. It will cost you only time: Google's Blogger, WordPress and others offer free blogging tools. With a blog, you can link back to your site and offer links to others. It's also a great way to start building content, Cutts says."