One thing that really helped for me was suggested in the recent Etsy Get Found symposium (you may want to go watch it in the Online Labs).
It is to have a friend who is not an Etsy seller search from the homepage for one of your items. Be mindful of what search terms he/she uses and then incorporate those into your tags and titles. I did this exercise with one my friends for 10 minutes and have managed to move from the 10th page in search to the 1st or 2nd.
Here's what I would search for this listing:
http://www.etsy.com/listing/97209717/pink-tree-necklace-rose-quartz-wireIf I were to try to find this from the home page, I would search:
-Silver necklace with pink beads
-Sterling silver necklace, pink tree
-Pink Fertility Tree Necklace
-Rose Fertility Tree
-Fertility Jewelry, silver