One of the most obvious signs of aging is a sagging neck and jaw line, and women have a tendency to neglect the skin on their necks until it's too late.

Quick fix:
The first thing you can do is adopt better posture by lengthening your neck and avoiding hunching your shoulders. Makeup artist Melanie Mills also recommends applying a good serum or lotion after cleansing. When it comes to finding an effective product, Mills says look for ingredients like sunscreen and exfoliants like salicylic acid or glycolic acid. "Along with exfoliating for smoother skin, these ingredients build more collagen and can help firm the skin," she says.

Mills also recommends using the same light-reflecting and wrinkle-filling primer on your neck that you use on your face "to deflect light and give a more perfected appearance."

Over time:
Weight fluctuations can contribute to the sagging skin around your neck. Lupo says that the single best solution to "turkey neck" is to maintain a healthy weight. Also, don't neglect your neck in your daily skin care routine. Apply sunscreen and moisturizer to increase the skin's elasticity and protect it from damaging rays. If you notice drooping skin around your jawline, apply the same peptide, growth factor or retinoid product you use on your face to your neck and décolletage.