Courteney Cox's Must Haves, From a $300 Cream to a $9 Mascara

Cox's skin-care regimen is always changing as she likes to try new products, but lately, she's been applying the Dermalogica Skin Dynamic Recovery SPF 50 ($79) religiously. One thing that's always constant in her routine is her big ProPanel Red LED Light, which she rolls over to her bed before doing anything else. "I sit there for 20 to 25 minutes under that, and I just try to breathe and think, this is the only time I'm going to be still for the whole day," she says.

Pro Tip: LED light therapy boasts a myriad of benefits for the skin, depending on the color of light used. Red light is great for antiaging and cellular rejuvenation while blue light is helpful at treating acne.