4 ways you can make your content evergreen

Miranda Miller at TopRank blog says:

1. Remove any timely elements from your post. There is a time to refer to a recent study, share news, or tie your post to a trending topic, but this isn’t it; this can quickly make it appear outdated.
2. Invest time in making it awesome. If you really want a piece of content to be a source you’ll refer your readers back to for the foreseeable future, don’t do it halfway.
3. Incorporate multimedia elements like photos from Flickr, SlideShare presentations or videos embedded from YouTube. Images and video can be helpful in explaining concepts and add visual interest. Plus, each is searchable in its own right and when linked, can lead visitors from those properties to the helpful resources on your blog.
4. Optimize each piece for search engine discovery and social sharing. This is best practice for any type of content, but especially important to keep it living after the initial buzz of a newly published piece dies down.