Sidenote - I present this as evidence that Pippin delights in knocking things over:
Anyway, I picked up some cheap frames from the dollar store, and some craft paint from Michael's (Martha Stewart's Gloss paint in Pond). The original plan was to display my jewelry in my bedroom, but after Daylight Savings hit it was pitch black in the morning and I started getting dressed in the closet to avoid waking up my husband. So my jewelry needed to move to the closet too.
I used a glue gun to put in clear plastic cross stitch canvas for the earrings. The canvases come in relatively small sizes, so I had to buy two smaller frames instead of a single 8"x10" as I had originally envisioned. The holes in the cross stitch canvas are the absolute perfect size for earrings, so I'm happy with it.
As for the necklaces, my husband helped me drill holes about an inch apart to screw the hooks into. The first few hooks went in fine, but eventually the wood split, leaving the hooks wobbly. I filled in the empty space using a glue gun, and this made things much more secure.
Once the hooks were in, the frame no longer laid flush against the wall, so I cut a few strips of cardboard out, and glued them against the top part of the frame, essentially projecting the frame out from the wall about half an inch. Then I used velcro hanging strips to secure the frame to the wall. You can see in the picture below that it's mounted at little bit of an angle to allow for the hooks:
Overall, I'm really happy with how this project turned out. I even enjoyed coming up with solutions to the little challenges that cropped up along the way. And, best of all, my jewelry is now safely out of Pippin's reach.