If I were an editor...
Uploading photos, we have to remember that we do it for somebody. Cause any stock is like a great market where you sell and someone can buy images. So your idea should be clear to anybody - in Africa, Aisia, elswhere.
So when uploading photos I imagine an editor of a magazine who needs some pictures. And having in mind that imaginary editor, I ask myself "If I had to pick pictures on some topic, what would be interesting for me?"
Photo credits: Anatoly Frumgartz.