I may be a few days late on this, but why limit thankfulness to one day?
As a writer, I am very thankful for the Erotica Readers and Writers Association. It is, hands down, the finest writer's community on the internet. I belong to several lists for speculative fiction writers and queer writers, but they don't begin to offer what ERWA does.
The ERWA website alone is worth a visit, but the lists are its true strength. The writers list is an excellent source of information on everything from grammar questions to publishers. Storytime offers writers a chance to have their work critiqued. It is a workshop unlike any other I've been to. Writing can be isolating, so having access to the ERWA community is fantastic for me. There's nothing I like more than chatting with other writers.
There are many other things I'm thankful for that sound trite but aren't. I have a roof over my head, clothes to wear, food, and clean water. That puts me at a standard of living far above 90% of the other humans on this planet.
And I have love.
Everything else is simply icing on the cake. I'm thankful that I understand that.