Our pick: Club Monaco Nola Estate Necklace ($130)
Why it's a holiday staple: When all else fails, a little sparkle front and center can go a long way. An eye-catching necklace can instantly transform a casual blouse into an embellished top, and if you need to head straight from the office to the holiday party, this is your easy answer. The trick to these kind of over-the-top accessories is to look for ones with an "adjustable" element, and in this case, it's all about the self-tie ribbon. You can play with the lengths — keep it long for a relaxed, jeweled silhouette or pull it tighter for a collared look.