The biggest taboo for us ladies, is the turtle neck, this item of clothing must never be worn, unless you are camping in cold weather, and with relatives. The only way it could possible be permitted would be if it were worn with a large scarf or poncho to mask the neck part. Basically all high necklines are bad, as they enhance the length of torso, in fact even a basic tee-shirt is not so good, as it has a highish neck line. More feminine tee-shirt versions that have some buttons in the front to be left unbuttoned are a suitable alternative the regular tee.
The optimal neck line, is a V neck, or other such low and open necklines, as these do not have a lengthening effect. If the weather is chilly you can wear other visible clothing underneath the V-neck but in a different color. In fact a tube-top is the ultimate torso shortening top, but one needs to have supple teenage breast to pull of this bra-less, no strap clothing item on its own. Otherwise wear a tube top over a shirt for example, sort of like a corset for a great all breasts type look.
Layering is a very necessary practice for us, as many pretty tops are too short, thus equip yourself with basic tank tops in dark hues, that are long in length for layering under everything. This under shirt or tank should always be darker then the top layer shirt. This way it creates an illusion that your top half is shorter than it is, as the eye sees the end of the lightly colored top half clothing item as the end of the torso. Which brings me to one mistake some long torsoed females make, which is to wear just a long lengthed top, or a tunic reaching the hips or thighs. Simply put, wherever your top clothing item touches your bottom clothing item is where the eye perceive the end of the torso and the beginning of the legs. So you want this important line to be relatively high, and if your trousers and your top do not meet then you bridge the gap those basic dark long tank tops.
Regarding color and pattern, the top half of the body is where you can go all. Keep the bottom half entirely black or dark, and the top half light to draw the attention up to your face and not down to your legs. You can have fun with color and patterns here, horizontal lines the the obvious best, and jewelry is also a good idea, especially earrings.
Coats are best long to the knee with an elegant high waist and an A line spanning from the waist down to mask where the butt ends. They should be figure hugging only in the top half. Regarding short jackets, well they look very good with a dress, however when it comes to wearing them with trousers or jeans be careful of the length, it should not be to the hip, but higher.
Another cool optical illusion is long hair, as it covers the back, hiding its true length. Say you have your hair out and it reaches half way down you back, this really mask everything going on back there! So very short hair while being good for petite females as it does enhance the neck and make them seem taller, it is not good for us as it showcases our long backs.
BOTTOM HALF DO'S:
My greatest advice is to wear all black on the bottom half of your body as this color lengthens, and narrows and distracts. Thus your shoes, socks, tights, leggings, skirts, trousers and so forth should be ideally all black, or at least a similar color like navy, brown, gray etc...
Try to wear some sort of a high heel, obviously spiky four/five inch stilettos are unreasonable. Who wears those? I certainly don't. But a wedge, or a sturdy stacked heel by a brand that focuses on comfort is a very good idea. During summer when your legs are bare choose shoes that are nude colored to match you skin tone. During winter, tall boots reaching your knee or higher are very flattering, and make sure to never buy boots that are below the knee, particularly mid-calf, however those cute looking ankle booties are fine.
Never ever wear pedal pushers, or capris, or cropped pants as this drastically shorten the legs. Thus either wear short shorts, (never below the knee) or long pants/trousers that touch the ground. Regarding waist lines, those low waisted jeans that sit at the hips or lower are extremely unflattering for us girls, so higher waisted ones are better, but be careful to not go too high in the waist as that can draw attention to the problematic long back area.
When it comes to skirts, don't choose pencil or narrow tight skirts as this shows how low your buttocks really are, so it is better wear high waisted skirts (at your belly button) that are very puffy, almost like a ballerina tutu, or like skirts of the 1950's which become an almost complete circle when you spin around. This way people are tricked into thinking the legs are long, and the buttocks quite high up. Also regarding skirts, A-line skirts are fine too, but stay away from dropped waistlines, the ones that are tight through the waist and buttocks, but then fan out. These can make a woman's behind look voluptuously nice, but this style will only accentuate a long back, shorten the legs even further.