A while ago, I mentioned that I'm using twitter to post links to some of my favourite artists. Now I've also started a new tumblr to post pics of my favourite artworks.
Hush by Audrey Kawasaki
Grotto of the Old Mass by Mark Ryden
Brothers by Ana Bagayan
Three Ama Enveloped in a Crashing Wave by kozyndan
You may find some new favourites here (and some old favourites!) and maybe some inspiration.
I've also found a few painting demonstration videos from various artists and I popping them on this site too. Like this one from Ana Bagayan:
So pop over to artobsessions.tumblr.com and take a peek.