Hyaluronic Acid Serum: Hyaluronic acid is one of the best moisturizing ingredients out there; able to hold 1000 times its weight in water, it instantly makes skin look and feel more moisturized. In a serum like SkinMedica HA5 Rejuvenating Hydrator, $178, it will deeply hydrate without feeling heavy, says Cheung.

If your goal is to banish breakouts, the right combination of products and zit-zapping ingredients is essential. This trio will do the trick:

1. Salicylic-acid cleanser: The gentle exfoliating ingredient dissolves oil, de-gunking your pores and helping to eliminate blackheads and whiteheads, making it a great option to use daily via a cleanser. Try Neutrogena Oil-Free Acne Wash, $6.99.

2. Non-comedogenic sunscreen: No, sunscreen will NOT make you breakout ... as long as it's labeled oil-free and non-comedogenic, notes Carqueville, who recommends EltaMD UV Clear Broad-Spectrum SPF 46, $32.

3. Treatment: To target pesky pimples, Carqueville suggests using a treatment that contains benzoyl-peroxide. "The combination of benzoyl peroxide in the spot treatment and the salicylic acid in your cleanser is a double whammy to knock out breakouts," she says. One option: Dermalogica Special Clearing Booster, $46.

Peel pads: "Typically these contain both alpha and beta hydroxy acids, which break down superficial oil, keep pores clear and help with excess pigmentation or scarring," explains Jeung. Not to mention that they're super easy to use -- just swipe and go. Depending on the concentration of the acids, some can even be used daily. The Dr. Dennis Gross Skincare Alpha Beta Universal Daily Peel, $16 for five treatments, is a classic.

Red, dry, itchy ... sensitive skin is no fun to deal with. But by incorporating the right ingredients (and avoiding others), your complexion will feel -- and look -- less-stressed. Here are some suggestions:

1. Fragrance-free cleanser: Many cleansers (and most skin-care products, for that matter), contain fragrance, one of the most common skin irritants -- especially for the sensitive set. And don't be fooled if the product you're looking at says it's unscented; it can still contain an added masking fragrance. Pick one labeled fragrance-free, like Carqueville's pick, First Aid Beauty Face Cleanser, $20.

2. Physical sunscreen: When it comes to your sun protection, physical blockers with ingredients like zinc oxide and titanium or dioxide are best. "They're much less likely to cause any kind of skin reaction or irritation than chemical sunscreens," Carqueville says. While these formulas were once thick and chalky, new innovations have made them lightweight, sheer and more cosmetically elegant than ever. Avene Mineral High Protection Tinted Compact SPF 50, $36, is proof positive.

3. Soothing mask: "Masks with calming ingredients like aloe, chamomile or licorice extract are a great option for sensitive skin," says Jeung. They deliver those ingredients quickly and in a heavy dose, yielding results fast -- ideal if you need to quickly tamp down some redness. Try Joanna Vargas Euphoria Mask, $75 for five.

Peptide night cream: Night creams can pose a tricky conundrum for anyone with a sensitive complexion, since many tout potent anti-aging ingredients that can increase sensitivity. Stick with peptides; made of amino-acids (the building blocks of protein), they can help smooth skin, but aren't super aggressive or irritating. Find them in Olay Regenerist Night Recovery Cream, $24.99.