You probably have excellent blog content that has been archived away like it has gone past its sell by date. This shouldn't be the case particularly for blogs that have worthy content that should not be forgotten. The blog posts might have been shared across your social media channels in the past but that doesn't mean they cannot be shared again now!
Take some time to go back through your blog entries; pick out a select few that you feel really hit the nail on the head so to speak. Even though you might feel that your content should speak for itself, to increase its effectiveness you could spend some time working on how you can refresh your chosen blog entry that so it is ready to go viral for round two.
Using visuals and images is a great way to add some life to your blog entry. Remember an image can speak a thousand words and can be a great way of getting your message across. Not only will it break up the content, using images can refresh the blogs look and maintain a visitor's attention for a longer time frame than if an image was not present. So why not add an image and bring your blog back to life.
When you are happy with your new / refreshed blog post, shout about it on social media and start driving traffic back to your valuable content.