I don't put any effort into facebook (although maybe I should, but I don't currently). I mainly "favorite" items that I see and like (click on the heart in the upper left hand corner of an item's photo.) I love to look at the home page listings and at other people's favorites and then I "heart" a few each day. It all shows up in the activity feed and everyone can see what items and shops I like as well as the shops that like me back. I like seeing all the cool things everyone has. I never like something if I don't REALLY like it. I don't have a ton of sales (at the moment) either. But I went from no sales at all, to 23 sales, simply by clicking on the "hearts" of my favorite things in other peoples stores. So, I guess it's true..."What comes around, goes around!"
Share the love for OTHER peoples things and they might just share it back!!!
Good luck and enjoy the learning curve!! (It never actually ends ya know. : )