I use twitter to announce streams when they go live. I currently am working towards a set schedule but until then twitter is one of the best ways to be alerted.

That being said I also update finished art on Twitter and Tumblr first if that interest you.

Twitter - https://twitter.com/SinaArt
Tumblr - http://sina-art.tumblr.com/
Picarto - https://picarto.tv/SinaArt