I'm just getting started too, and I don't have much in my shop yet, so I'm not aggressively promoting my shop yet. But I've been doing a lot of research, and it seems to me that most folks use FB and Twitter to promote their shops, along with their own blog/website. You might try making a Pinterest board for your shop too. There's this great book that just got published called Etsy 101; the ebook on Amazon is like $3, and it's been a really great resource for me.