I wish there was a definitive answer, but these days I think sales are erratic for most lower to mid-volume sellers, and methods or ideas to help are hit and miss, even for the same seller on different days. The only thing I can really suggest is perhaps diversifying your range a little, including some other things your customers might be looking for (books, patterns, thread, scissors ?) so that they can cross-promote each other.
Some of the things I do when sales are in a bit of a slump are start a sale (I see you have some stuff on sale now), revise listings with better photos, change the title a little, and end older listings that haven't shifted for a while. Usually those with fewer views and watchers, although I ended a listing the other day that had collected 15 watchers in the last few months yet not sold. I relisted it a week ago and have now sold two, so refreshing the listings does seem to help. The larger stores probably have enough stock range and turnover not to worry about a few things that don't get any attention for a while.
