https://www.etsy.com/listing/119363451/la-veeda-original-poster-1920first my new listing but.... I'm at 90 something and I think 50 is minimum for good showing. Me, I'd love to get up to 150. Treasuries yourself? I think more important to be listed in different ones.
Definitely posting in these forms is a big way to get notice on etsy, favoriting shops you like, etc. A lot of people also say offsite promotion like wanelo, facebook, a blog or whatever is also crucial. As a new seller and someone who is not big on wasting time with blogs or facebook--obviously not something I have much advice on.
Joining teams related to your product I found to be important, I added my url to bing, yahoo, google. Also just look at the other products in your category and see price points, shipping, descriptions. Everyone says great pictures are important. Try to use 3+ when you can. And look at Ebay as much as we like to admit on here it is irrelevant it isn't. What are similar sellers doing on there, charging, setting up there shops. Offer a good product at a good price and people will buy. Rule number one of sales.