no earning

I have 30k+ traffic on my mp3 site but earning is lowest, under 3$ How can i monetize traffic to earn more than 3$ per day.

I own around 30 websites, I can give you a list through PM if you want, however I do not earn. NOT EVEN A SINGLE CENT. Most of the domains are 5 months old while the rest are 2-4 months old. I wanted to start earning money badly but I can't find the right money-making method for me. Do you...