As a matter of practice at Mashery, we regularly poll developers about their pain points in order to learn which resources help best address the points they identify. We advise clients to make it a habit to actively listen to developers -- both inside and outside their company -- if they want to design an API that developers will use. Listening can take the form of monitoring Twitter, Quora, and Stack Overflow, setting the right Google alerts, but if you prioritize correctly, you should also schedule opportunities to listen to developers in person.
