I agree with the showcases, they do help. But you really gotta watch what day you are buying. Some days will have more viewers. I can't remember the name becuase it has been a while since I checked it, but it is called google antalitics, and you can do a little research with your shop to see when it gets more views.
Also, I think relisting as often as you can is a fantastic idea. Last year when I decided to start selling patterns in my shop, that is what helped me, I relisted as many as I could. Try it for a month and see if it helps.
And the photos and descriptions are HUGE!
sorry I am a rambler, hope this helps.