I thought for sure I had shared this link before, but in digging through the archive it looks like I missed it.
So here you go
TTYU Worldbuilding Hangouts
I highly recommend perusing. Whether you're stuck in a bind and
stumbling through your story, or if you just want a good read that is
bound to spark ideas, these are they. You will have a hard time coming up with anything these don't cover. If you prefer to watch than to read (because the material is very dense at points) Juliette Wade also posts them as videos.
And I have plugged these before, but I'm going to do it again for a one-stop-shop:
A Way With Worlds
Shakespeare & Dragons