There are a couple of threads here listing specific music recommendations (monthly thread, jazz box sets, etc.), but how about pointers to music discovery sites and sources, where do you learn about new music? (sort of like the internet radio swap thread).
Here is one site I have been checking out:
This site plots every genre and sub-genre you can possibly imagine and then artists underneath (derived from and linked to Spotify)
I have some others but for a later reply.