If you'll notice the little containers underneath the shelf here; I used Glad plastic containers from Hillshire Farms deli meat containers! I had tons of them stacking up and I love to use them for storage. What I did here was: I drilled a small hole through the inside of the lid, exactly in the middle of the lid, to the outside and into the bottom of the shelf. I made sure that the tab from the lid was facing toward me and I left space of 1/4 inch between the lids. Then I used a small screw to attach the lid to the shelf. The containers just snap onto the lids and they work like a charm. They kind of suction on the tub part of the container as the middle is drawn up by the screw. I have some heavy stuff in some of them and the lids just hold on to them!
I plan to put more up as I get the opportunity. I also plan to get tins to velcro to the sides of the embellishment center, as long as they are not too gaudy!