the visitors to your blogs /websites can add to your content easily by leaving comments, or adding reviews of your site prducts.
articles featuring your company
keep tab on articles that mention your website and your products. you can then link to those articles or add their content to your websites
syndicated content
nobody would like to visit a website which has two year old articles on homepage, it's always good to show that your website is upto date. Thats where rss links comes in, you can show updated news related to your website in side menu. that will make your website look fresh and healthy.
guest contributions
not everyone owns a website or a blog, but they would love to see their stuff on internet. why not ask one of your friends to write an article for your product, or ask them to visit a place for you to review about it. the best thing is it will be free of cost and will add content to your website.
royalty free content
you can add content from royalty free websites like www.articlegeek.com and www.aracontent.com
but please do keep in mind that this content is not unique as other blogs might have already used it. you can also read about creatives commons content and use articles available under that license.
