I also suggest working on your SEO. Instead of using single word tags, use tags like: Creepy Dolls, Creepy Gifts, Creepy Decor, Gothic Art, Halloween Gifts, etc...
A few weeks ago I felt I was also in a slump. After working on SEO, adding listings and updating photographs, someone mentioned the magic number to get more traffic to your shop is 100 listings. Sure enough, soon after I reached 100+ listing, I noticed an increase in views, favorites and sales. Good luck!