This is as easy as it gets.
Have you published any great posts lately? Well, you can publish them again.
Sites like Medium and Business2Community allow you to republish content on their platform. Just spend a few minutes editing the post to fit their community better and publish.
Syndicating content to other sites lets you reach a larger audience with every post. To avoid SEO issues with content ownership, wait until after Google has indexed the content on your site. Even better, use a rel=“canonical” tag to point to your site as the original publisher. Not every site will let you do this, but Medium has this option.