This vraag has been asked like 1000000000 times but ok.. No, nobody knows the answer. just keep adding things to the spot u want medal and u will get it someday.
Make sure u add QUALITY things to the spot though. Adding repeated content annoys the crap out of people and is a waste of time. I also advise u to always give accurate credits and descriptive keywords. This makes people meer likely to rate your content (and rate it highly) which will help u get the medal that u deserve.