You should first consider your shirt when determining the color and pattern of your tie — and then your suit. A crisp, white shirt and a dark navy or charcoal suit will always accentuate a brightly colored tie.
Pattern layering can work when the patterns on the shirt and the tie complement one another, and a patterned tie with a white or light-colored pastel, like blue or pink, works well also.
Choose your knot type according to your shirt. A widespread collar will look better with a large and triangular-shaped knot. This type of knot also looks better with an Italian silk tie.
A straight-point collar shirt will look better paired with a narrower knot and a longer extension. A tall and lean gentleman looks better with a small, longish knot. Men that are stockier and have a thicker neck should opt for the wider knot and more proportionate tie width.
A tie should end near the middle of the belt buckle. If you are a taller man, purchase a longer length tie to accommodate your height so that you appear proportioned.
This should be self-explanatory, but wearing a tie that is wrinkled or stained will make you appear unkempt, no matter how good the rest of the outfit looks.
Wash your ties by hand and dry them by hanging them over a chair or clothesline. You can iron a tie lightly with a cool iron or a steamer if it is wrinkled. Also, store your neckties properly on a tie rack to avoid unnecessary wrinkling.