So, I'll be upfront. The likelihood that I could post a different song each day from within my collection and NOT fall into the trap of getting 'stuck' in a particular style, or similar sounding song, or exploring every extremity of a particular artists back catalog is pretty damn low.
I'm going to, for the most part, rely on the endless random mix feature of a Lyrion Media Server plugin to pick for me an artist and/or a song that I'll then post. If Spotify doesn't have it, I'll go searching for other providers, but I will stop short of posting from my own CD-converted collection - I can't afford to get sued after all!
Today, LMS picked an artist that dovetails nicely with yesterday's Stoner / Sludge rock vibe... Enjoy Dozer.