Another important part of your webpage's head section is the meta description tag. This 160 character snippet is free advertising copy that gets displayed underneath your title content in the search engines.
I've seen hundreds of websites that completely ignore this tag. It's very easy to find in your source code:
So, check to make sure it's on all of your webpages. More importantly, check to make sure you're not duplicating it across multiple pages. Duplicating a meta description tag is not a search engine penalty, but it's a very big marketing mistake.
A lot of people gloss over the meta description, but you really should put some thought into it because it is read by search engine users. Think about what copy would help pull in more visitors and increase click-throughs.