One of the biggest mistakes women trying to slim down make is treating every calorie the same. Many women think the calories from say, a granola bar, are going to be processed by the body the same way the calories from a chicken breast are. This is not true, says Kirsch. When you are trying to loose weight "skip processed carbs and excessive fruit or fat. Stick to nutrient-rich, quality calories such as chicken, quinoa and vegetables," he says.

According to celebrity esthetician and skin care expert Ren�e Rouleau, women need to get facials at least four times a year -- that's once at the start of each new season in order to remove dry skin, correct discoloration and brown spots, and most importantly, stimulate cell renewal for a fresh face, says Rouleau. So if you haven't had a facial since winter, it's time.

If you can't get to a spa to get one done, make sure you are giving yourself mini at-home facials on a regular basis:
Step 1: Start by washing skin with a mild cleanser.
Step 2: Use a facial exfoliant to remove dead and dry skin cells. Try Eraclea Daily Bamboo Exfoliant, $40.
Step 3: Immediately follow with a few drops of a skin-repairing serum, then apply a thin coat of a clarifying mask to your entire face and neck. The mask will help the serum penetrate deeper into your skin. Try Origins Clear Improvement Active Charcoal Mask, $21.
Step 4: Leave on 10 to 15 minutes, and use a warm wash cloth to gently clean off your face. Finish by applying your favorite moisturizer.

If you have oily skin, summer can be the worst time to try to keep breakouts at bay, as sweating aggravates acne and leads to pimples on the body and face, says dermatologist Heidi Waldorf. She recommends treating mild to moderate facial acne with retinoids and benzoyl peroxide, which you can get from your doctor or in some drugstore brands. Other ingredients to look for: zinc sulfate, tea tree, caffeine, and niacinamide, which will all work to slow oil production. See the highest-rated acne fighters here.

When it comes to clearing body acne, also look for a wash containing benzoyl peroxide like Clark's Botanicals Skin Clearing Face & Body Wash, $46.

With your body on full display, you're going to want to have smooth, hydrated skin, which means taking care of any dry, cracked or rough patches with a little TLC. This means paying extra attention to your knees, elbows, heels and hands.

Start this process in the shower by applying a super moisturizing body wash like Dove VisibleCare Creme Body Wash with NutriumMoisture, $7.99. Lather it over your body with a loofah to gently exfoliate and hydrate skin at the same time. Once you're out of the shower, rub a lotion all over and add a couple of drops of body oil like L'Occitane Almond Supple Skin Oil, $34, which works to repair the hydrolipidic barrier of the skin and really sink into those rough patches (knees, elbows, etc.) So you get glowing -- fast.

Body hair is the last thing you want to worry about this summer and "waxing is a great alternative to shaving if you have hair you're uncomfortable with," says Susmta Patel, a waxer who has worked at the acclaimed Completely Bare Salon in Manhattan. "Waxing is better [than shaving] because it removes hair from the root," says Patel. She adds that when you shave "you just cut the hair, so two hours later, you can see the hair there or a blue shadow, which is the hair follicle below the skin." Waxing, on the other hand, not only lasts up to a month, but it's also more permanent -- over time, it thins the hair so less grows back, says Patel. Bonus: It exfoliates the skin as well, leaving you feeling silky smooth (and leaving you with one less skin care to-do).

If you opt for waxing, Patel warns not to use any scrubs for the next 48 hours and not to expose the area to direct sun for at least 24 hours. Also, to treat any resulting redness or swelling, apply a small amount of cortisone cream from the drugstore, says Patel. If you choose to stick to the good ol' razor, make sure to shave after you take a shower or bath, so your hair is softer and easier to remove. And always lather up with a moisturizing shave cream (try Aubrey Organics Creme de la Shave, $4.33) and use a brand new razor to minimize irritation.