Cord magick adapts well to helping others who may not use magic themselves. You weave the intent into the cords, and the person wears them knowing what spell you used and what the desired outcome is. You cannot give a person a cord and expect it to work without their knowledge and cooperation. The person wearing the cord must know what it is about and be a willing participant in the magical intent.

A  magickal use of the cord is as a "storage cell" for the power - for some magick, the time for it to happen is important.

One very basic use is for protection. A cord can be made with the intent to protect the wearer from harm by psychic or magical energies. Then when worn the cord protects the wearer. Specialized cords can be made to protect from specific types of harm as the need arises. One caution, these protective cords should only be used when needed, not casually worn day in and day out. They work well when sleeping in an unfamiliar place, or visiting somewhere the wearer is uncertain about. 

Another use for cords can be to help performance on the job. Weave them with the intent that you will do your job better, be more professional, make fewer mistakes, make a good impression on others etc. then wear them under your clothes to work. You could wear them every day (taking them off after work), or maybe only on Monday, or the toughest day of your week. Eventually you will no longer need them, as you will have internalized the message. 

Some people use cords to invoke certain God or Goddess energies. As Deity has many aspects, you can use cords to symbolize a certain aspect of Deity, and when woven with that in mind the cord acts as a link to that Manifestation. These can also be used to invoke protection or aid from that particular God-form when worn.