Whenever I wear a strapless bra, I'm always tugging at it, feeling like it's going to be around my waist any second. A friend swears by the Super Strapless Adhesive Bra ($65) and even wore it under her strapless wedding gown. She bought one for me, and although it bumps me up a cup size (which I definitely appreciate), it feels awkward. I can never seem to place it properly, and the extra weight of the silicone cups just made me feel like it was falling off all the time.
Bring It Up Breast Shapers ($28) are stupefyingly simple, yet surprisingly effective. They lift, they offer nipple coverage, and the company has thoughtfully refrained from putting adhesive on the part that covers the areola (and it's reusable up to 25 times). While busty chicks might need extra support, A & B cups can be liberated from strapless-bra tyranny.