If you read my blog, then you absolutely should have APOD in your RSS feed and follow them on Twitter. I’ve had a long and very happy relationship with the APOD folks; they’re one of the very best astronomy sites in the world, providing a fantastic service. They also have excellent taste.
They have a 2015 calendar you can get, by the way; it’s a PDF and free. They do take donations, I’ll add. They bring you the whole Universe every single day, so please throw a little filthy lucre their way if you can.