I haven't been doing this longer than you here, but I have been selling online since 2004. I swear by renewing. If I renew something that's been in my shop for 4 months, many times it will sell right away. Its very strange, but it happens a lot. Sometimes it might not happen til the second time I renew, as just happened with a peacock brooch. The day I renewed, it sold. It just gets a new set of eyes on it.
Also, I would suggest you look at your sales to figure out what sells and do more of that. And I don't know if you signed up for a critique but you should. I see some areas that need work with SEO.. Every little bit helps.