I’ve read from many SEO experts to repeat keywords in your posts. Matt suggests using synonyms. I think that would make it easier to read as well.
He also recommends the SEO Title Plugin for Word Press.
Finally, he reaffirmed a long standing opinion of mine that it’s better to become popular with people and let Google find you, than to try to try to be popular in Google in hopes of people finding you.
I wish someone would have asked him about blog rolls.