search engine spiders
Google is another option. You can search for "keyword + Roundup" using Google. For results that are older than one week or a month, be sure to choose.
Find a piece that has a lot of backlinks in your industry.I sent, for example, all the tools I mentioned in my Skyscraper post. Here is the exact script I used:
And since I wasn’t pushy, spammy or intrusive, most people were happy to share my content through social media (some even linked back to it).
On average, I found that two out of 10 answers get picked-up. Although this isn’t terrible, if you’re anything like me, you don’t want to waste eight other answers that don’t get published.