A recent article in the New York Times featured Brandee Parker who was once head of marketing for Facebook. In the piece, Ms. Parker talks about the time she and a colleague brought a black suit for her boss, Mark Zuckerberg, to wear on his first trip to Davos, Switzerland, for the annual meeting of the World Economic Forum. They thought that the occasion called for more than Zuckerberg wearing his usual hooded sweatshirt.

Mark never wore the suit. Instead, he put on his Patagonia sweatshirt. (And we are all not Mark Zuckerberg or a CEO of a Fortune 100 company.)

However, I agree wholeheartedly with Brandee.

This does not mean that if I like to wear leggings and an oversized sweater that those clothing choices are appropriate in a business setting. There are many choices today. In fact, a nice pair of slacks and jacket can provide the same comfortable feeling as a sweatshirt.

When I have garnered the respect capital then maybe the leggings will be appropriate. (I saw that Sheryl Sandberg wore them stage for a presentation showcased on the TV show, 60 Minutes. She certainly has the respect capital.) Also, I have learned if my clothing does not feel comfortable and keep me true to myself, then I think twice before moving ahead. I give the same advice to my clients.

The rule of thumb for men is that the last button on a jacket should be left unbuttoned. A jacket should be buttoned when standing and unbuttoned when sitting. In casual settings, a blazer or jacket can be left unbuttoned when standing. The double breasted jacket is always buttoned when standing up.

The rule of thumb for women is for the one button (if a one button jacket) to be buttoned when standing and unbuttoned when sitting. When there is more than one, which should be unbuttoned or buttoned depends on the body type of the person wearing the jacket.

For women:

A critical detail that determines if a look will be smart is how an individual wears their clothing. Short jackets will always look smarter with longer skirts. Longer jackets will look smarter with shorter skirts. Tops should always be at the narrowest width just before the hips.

For men:

Shirts and Ties: Small size prints can be worn with larger prints. You use colors to tie them together. For example, a shirt with a smaller print worn with a larger pattern tie will look smart. Never wear the same size print for both and ties. The preference is for the smaller print on the larger item and larger print on the smaller item.

I apologize if I sound like a broken record but from head to toe, the really coordinated folks have all the details of their appearance in order. The hair needs to be well groomed (long hair only works if it is well managed) and complemented by top quality, well maintained accessories; sleeves, jackets and bottom lengths all should lay nicely at the proper spot.

Often, the excuse for a disheveled appearance is a lack of time. However, if you make the time in the beginning when you purchase the items good habits will be there, too. You will then always look your stylish best.

1. Do you find that you have things in your closet that you have not worn because you don’t have anything to wear with them? Never purchase anything unless you have three clothing items in the closet to go with it or buy at least two items to wear that work with the garment.

2. Purchase items in three colors only. Most folks have black pants or skirts so the key to purchase shirts, jackets, sweaters in three colors in addition to black.

3. Last, but not least, only purchase items that fit in the shoulders, chest and jacket/sweater length. It is easy to shorten sleeves but tailoring in these other areas can be very expensive and tough to pull off properly.

In all fabrics, from knits to denim, leggings are back. Wearing them smartly depends on your complete look. (No matter what, do not wear leggings at work.)

From the top of your garments down to the shoes or boots you wear, leggings cannot look like exercise or yoga clothing. They have to complement the rest of the clothing to form a complete outfit.

The number one offense with leggings is wearing them with thin tops that barely cover your hips. The second one is wearing thin leggings that are so tight they look like a second skin.

Full rimmed black and colored glasses have replaced the rimless glasses. The key is finding the right frame size and shape. Your eyes should pop in the frames.

The thickness of the frames looks best when they balance the shape of your face and hair. If your face and hair have a lot of texture, then narrow frames would be best. The opposite is true if your face and hair are very sleek. Then a heavier frame would add character to your face.

Rimless glasses look okay on wide faces because the side pieces will narrow the face.

Be sure to take your time in picking out your frames. They must feel comfortable and you want to feel confident in them. You also should consider having more than one pair.

The trend in women’s clothing for tops has been moving toward three-quarter length sleeves instead of full length ones. The reasons are because it saves money, starts something new and helps women for whom sleeve lengths are a problem because they do not have the flexibility of getting sleeves shortened without an added expense.

Three-quarter length sleeves can be wonderful solutions for women who always seem to have sleeves be too long on them. However, make sure this length does not make you look wider, matronly or old lady-like. Suit jackets should come with a full-length sleeve unless it is a summer suit.

Give it to the fashion industry for always wanting to revolutionize how men and women wear jeans. Here are some guidelines:

Straight leg jeans are the modified skinny jean and easier to wear. To pull off the skinny leg jeans you must have very slender legs and the pant leg should not bunch up. The traditional style where the leg is wider but still straight will work well for women with larger legs. Also, the boot cut is coming back. If you were to purchase a new pair today stay with the straight leg one and you will be contemporary.

The fall trend for coats is color—no more black, gray or brown coats. Orange and yellow are in. Bright is fashionable. The challenge for bright colors especially when you are used to more subdued tones is that we may buy a bright coat and end up not wearing it. We fold under questioning and go back to the colors that we are used to.

This is where interchangeable scarves can help by adding color. Today’s scarves come in many different fabrics, colors and patterns. Start with solid color oblong ones that you can wrap around your neck. Next, branch out to patterns and bold shapes. The beauty of this is that if you don’t like the color you can quickly choose another one.