This article is by Clint Watson, former art gallery owner/director/salesperson and founder of FineArtViews. You should follow Clint on Twitter here.
What's the first thing you do when you sit down at your computer?
Probably check your email.
Then what? I'm guessing that you check Facebook or Twitter. Then you probably check your email again for good measure. And hey, better check Facebook one more time. Maybe a few niche sites. Artists might check BrushBuzz. 
What about on the weekend? Or when you're on vacation? Better check your email just in case.
Most of us do this. We're addicted.
Changing gears: Do you ever pull up Google, and, just for fun, start typing random search queries?  Have you ever broken away while on vacation and thought I better run one more search "just in case."
Of course not.
What channels do you want to put your art marketing time, money and efforts into?
You've got two types of channels - one that most people are addicted to and check obsessively, and another non-addictive one.
Put the bulk of your marketing effort to be in those addictive streams that we're all obsessively checking.
Feed their addiction. Rock on.
Now go change the world,
Software Craftsman and Art Fanatic
PS - if you want a Facebook-integrated email newsletter tool, give FASO a try. We'll help you feed their addiction.
 Of course, we feed artists' addictions at BrushBuzz by emailing the artist if a thread they commented on is updated. We like to keep 'em coming back. :-)
 I think possibly the most addictive automated message is the one Facebook sends saying, "You've been tagged in a photo." Have you ever not clicked-through on that message?
 This article is describing the behavior of "normal" people. Professional SEO's don't count. They get paid to sit at Google and type search queries.