How do you music?

I feel like I'm turning into a terrible old fogey when it comes to music. I mean, not that I was ever at the cutting edge of fashion, but I used to at least recognize some current stuff. ( long-winded description of my problem )

Recommendations of actual music always welcome, of course. I really appreciate people who do share music on their journals, like oursin and seekingferret and ceb. But what I'm really looking for is recommendations of how to music in 2015. How to discover new music, how to do music in a modern social media context, recommendations of places to go to look for recommendations. And how to buy music once I've discovered it. Any suggestions appreciated!