By Winged Wolf
First, you need a pattern lock. Refer to that document if you aren’t sure how to recognize signatures. Once you’re certain you can locate the person, use your favored system to send a thin sweep of energy across their approximate location until you find them.
Once you can sense them, send a denser energy beam to them, connecting it to their field. This is a basic link. Pay attention to energy flow along the link–you do not want to send a lot of your energy to them, nor allow them to flood you.
When you are ready to disconnect the link, first stop all energy flow, then “cut” the line (visualize scissors, get creative, etc). Do not snap the line, or cut it while energy movement is still occurring, or you may backlash energy into yourself or your target.
Once you have done this, immediately turn your mind to something else. If you don’t control your thoughts, you may automatically “look” for the link and/or the person, and re-establish it accidentally.
To prevent a person from linking to you, you may snap an incoming link (causing a deliberate backlash), or push it away using a shield. Cutting the link with a moving shield can help waste their energy, and keeps the link from penetrating beyond the shield’s outer surface–it also makes it harder for them to attach the link to your shield. Deflection is also a possibility–redirect the incoming energy to some other random point.