Taking amazing photographs is probably the single best way to showcase your products. In addition to good lighting and angles, "staging" the item can make a huge difference in its presentation. A lovely trend I've noticed lately is using vintage French postcards as backgrounds for small items--especially jewelry. It not only makes the jewelry "pop," but also adds a romantic, Victorian-era feeling.
Arete has some of the most lovely photographs featuring vintage postcards, a theme which carries through her entire site--including her banner and these great shots of her jewelry and packaging below:
Chinacherie's Eiffel Tower necklace goes well with this colorful, vintage Eiffel Tower postcard.
Another Eiffel Tower postcard from 1889 adds drama to these sweet earrings by Marolsha:
Another lovely French theme in earrings (on top), and a necklace below, from nostalgems.
For some helpful tricks on photographing small items, such as jewelry, check out either this storque article or one from my website. I've searched high and low for a simple, effective light box and this one by Sugar Panda is by far my favorite. And also check out my downloadable vintage French postcards on etsy.