How to Rank on Page 1 of Google FAST (In-Depth Case Study)
And Google will show you a list of blogs that tend to cover that topic:

You can even use Google Suggest to get even more keyword ideas:

Here’s how Perrin found his Guestographic prospects:
Like I just outlined, Perrin searched in Google using keywords like “pets and health.”
But he didn’t stop there…
He also searched for keywords like “top 50 dog blogs”.

These “best of” keywords hooked Perrin up with hand-curated lists of popular pet blogs:

Once you’ve found a quality blog in your niche, here’s what to do next:
Step 3: See If They’re Interested In Your Infographic
Most people pitch bloggers the complete WRONG way.