Many bloggers expect that guest posts you write for them will be unique to their blog. That means that they get an exclusive post that does not appear or your blog or anywhere else, before or after the blogger uses it.
Although you can not use that exact post elsewhere, there are ways to repurpose that content to get additional mileage from it. Here are some ideas for creative ways to repurpose your guest posts:
Write a brief summary of the post for your blog, and link to your guest post. That not only gives you more content on your blog, it promotes the blogger who hosted your guest post. (I emphasize the word “brief” here–just a paragraph or two describing the article to entice people to read the whole thing.)
Rewrite the article completely, and use it on your site or another. This does not mean “spinning” the article and replacing a few words with synonyms, but doing a complete rewrite.
Take a new angle. One way to do this is to write for a different audience and customize the article for them. For example, if you wrote a guest post on “10 Ways to Get More Customers for Your Accounting Practice,” you might rewrite it as “10 Ways to Get More Clients for Your Insurance Business,” using different examples and changing many of the details in the tips.
Another way to repurpose tips articles is to expand on a single tip. For example, if you wrote a post on seven ways to save money on groceries, write seven new articles expanding on the tips and giving more details on each of the seven ways.
The more content you create, the better. That is, as long as you are creating quality content. Repurposing your existing posts can help you to create more quality content in less time.