We're sure that most of you know this already but here's a little reminder just in case...
Everybody loves new and relevant content. Your customers love it because it keeps them informed of your products and services and the search engines love it because it shows that your site is fresh and in use. So, during the sometimes quieter winter months why not set yourself a target of updating the content of your site every week?
Here are a couple of links to help you on your merry way:
http://www.nb2bc.co.uk/marketing_online/articles/?id=64
http://www.siteart.co.uk/how-to-write-good-website-content-for-seo
Happy writing!