Safest and Most Dangerous files to Download

[skillzlikewhoa9]

I am sort of new to downloading files on a peer to peer network and just wanted to be cautious so I don't get infected with some malware.

When downloading a song what should I look for in a file to get the safest download? (I know not to download .exe files but what else)

1. No exe. files
2. Look for files that have bit rate listed

What else should I look for and what type of files should I stay away from?

I was looking for the same answers in regards to downloading movies.