Over time:
According to Lupo, several issues contribute to dark circles, and you've got to know the root cause in order to properly treat them. If your circles are more brown in color, overexposure to the sun is the culprit. Sinus problems can cause vascular congestion, which can give those circles a bluish hue. Allergies that cause itchy eyes (which you reflexively rub) can also thicken and darken the skin around your eyes, says Lupo.

First step: Wear sunglasses when you're outside or driving and use an under-eye concealer with SPF to avoid dark circles caused by sun damage. If your dark circles are a result of sinus problems or allergies, see an allergist or ear/nose/throat specialist.

Treating dark circles "is a real judgement call, as each case is unique," Lupo says. "Some need retinol-like ingredients, some peptides, some anti-inflammatory ingredients; there really is no one good way." When applying these creams, Patterson says to dab small amounts at the inner and outer corners of the eyes. Use your middle finger to gently press the cream into the skin by rolling the finger from side to side over the area. "Do not pat or rub the skin," Patterson says.

A healthy diet can also improve discoloration around the eyes. Choosing foods that contain vitamins K and B can help minimize dark circles caused by water retention and poor blood flow. Eggs, beans and green vegetables like spinach, asparagus and broccoli are good sources of vitamin K, and yogurt, fish and green vegetables are rich in B vitamins.

Marionette lines, crow's feet, frown lines -- you're familiar with the various names given to wrinkles. Even in your 20s, you may notice a few lines on your forehead or around your eyes. As you age, the collagen and elastin fibers responsible for facial volume start to break down. Muscle memory is also responsible for some of those wrinkles; essentially, every time you frown, you're teaching your skin to remember those lines.

Quick fix:
Before you put on your makeup, apply a serum with hyaluronic acid to help plump the skin. Primers specifically targeted to fill in wrinkles help minimize their appearance by creating a smoother, more even base for makeup. To really fill those wrinkles and avoid doing more damage to the delicate skin around the eyes, Patterson says not to massage the cream into your skin. Use your finger to press, hold and rock the hand back and forth until the cream absorbs, similar to the way you should apply eye cream.

If you're worried about the appearance of lines around the eyes, don't apply mascara or liner to bottom lashes or lash line. Patterson says these products draw attention to the area.

Over time:
Sure, you're getting a late start on the anti-aging game, but it's not too late to reduce the appearance of fine lines and prevent more wrinkles from developing, says Lupo. Start by using a topical cream or serum containing peptides or growth factors, which help stimulate the production of collagen, and get thee to a dermatologist for a prescription retinoid -- it's a key tool in minimizing the appearance of wrinkles, says Lupo.

For instant gratification, injectable fillers can create quick results that last four months to a year. If you're under 40 and have minor wrinkles, a treatment costs approximately $600, according to Lupo. The price is determined by the amount of time it takes to inject the filler and the type of filler used, so if you're over 50 and those wrinkles are etched a bit deeper, expect to spend several thousand dollars to smooth those lines.

Discoloration of the skin and brown spots, aka hyperpigmentation, are evidence that you've spent too much time out in the sun without proper sun protection. These marks are often referred to as age spots, but Dr. Lupo stresses that these marks are the result of sun damage, not aging.

Quick fix:
Stop us if you've heard this before: Wear sunscreen. We don't want to hear you complaining about your uneven skin tone if you're not wearing a sunscreen with broad spectrum sun protection on a daily basis and re-applying it every two to three hours when you're outside. The pros also say to avoid prolonged sun exposure, period.

You can camouflage those dark spots while protecting them with a BB cream that contains sunscreen. Many formulations offer anti-aging benefits, including skin-tone-correcting ingredients like licorice and arbutin.

Over time:
Hydroquinone is the gold standard for lightening dark spots over time, says Lupo. It works by reducing melanin, the pigment that gives your skin its color. Microdermabrasion or chemical peels can also reduce the appearance of mild cases of hyperpigmentation by resurfacing the skin and lifting facial pigmentation. For more severe cases of hyperpigmentation, there are a variety of laser treatments that your dermatologist can suggest based on your needs.