Dentists who are agents of the Conspiracy can, when commanded, implant an auditory surveillance device (ASD) into a patient's tooth, making anything they (and others nearby) say completely audible to Conspiracy operatives.  Dentists not in service to the Conspiracy can generally be bought easily, or conditioned to perform the task, with the event wiped from their minds afterward.

"Cleanup" crews -- remove all signs of Conspiracy involvement after any unplanned event or crisis.  Spray-cans of acid used to remove fingerprints and disfigure faces; any registered firearms or other means of tracing anything to the Conspiracy are removed.  Temporal magicks may be used, since operatives seem to consistently arrive before mundane officials, and seem to accomplish amazing amounts of covering-up before such officials arrive.  Mind magicks are used to replace or erase the memories of any witnesses to the event, and to discourage any notice of the operatives themselves as they go about their business. Sometimes, when extra-terrestrial or extra-dimensional entities have been involved, devices are used to sterilize and sanitize the dimensional environment as well (see Qui La Machinae).

Location of subjects on city streets through a system of widespread devices that react to implants in the subject, causing payphones to ring, which indicates to operatives the exact location of the subject (these operatives are usually mobile, in a black cadillac or other agency vehicle with the proper surveillance equipment).  In the last ten years this method has become somewhat outdated due to new developments in tecknology, but it can still be used quite easily, though somewhat less accurately.
 
Tunnels networking the entire United States and most of Europe, through which high-speed, high-tech subterranean transports travel.  Union operatives and even sympathizers use these tunnels to travel to distant locations quickly -- a trip from from San Fransisco to New York City takes from 1-10 minutes.  There are a few tunnels that run underwater from New York to London, Paris, and Madrid.  These are said to operate on space-warping technology, related to the tesseract.

bar codes

stickers on the back of stop signs that direct operatives to the nearest Construct
 
 
 
 
 
 

        "Deep Throat" (Season 1 Episode 2) -- Mulder and Scully take the advice of a mysterious contact and get chased by Men in Black after investigating the disappearance of a military pilot.

        "Fallen Angel" (1 x 10) -- Mulder sneaks onto a restricted-access crash-site, where a cleanup crew is covering something up...

        "E.B.E." (1 x 17) -- Mulder seeks the body of an Extra-terrestrial Biological Entity, but is thwarted by cover-ups and deception at every turn.

        "Erlenmyer Flask" (1 x 24) --

        "Little Green Men" (2 x 1) --

        "Talitha Cumi" (3 X 24) -- If nothing else, watch this one for the conversation between the Smoking Man and the shapeshifter "Jeremiah Smith".  Religion, the masses, the mysterious "Project".

        "Musings of a Cigarette Smoking Man" (4 x 7) -- A look at the life of an influential assassin employed by the Conspiracy, his alleged part in the killings of JFK, Martin Luther King, and more.

        "Memento Mori" (4 x 14) --

        "Tempus Fugit" (4 x 17) -- Part 1 of 2: an unexplained plane-crash with some kind of UFO involvement.  The Men in Black are covering up, and a special Gray Suit operative has been sent after Mulder, Scully, and all witnesses.

        "Max Fenig" (4 x 18) -- Part 2 of 2:

        "Unusual Suspects" (5 x 3) -- In 1989, two hackers and a nervous but idealistic FCC employee stumble upon a vast Conspiracy.  Enter the mysterious Suzanne Modeski.  Mulder is driven to mad babbling, induced by secret suggestibility-chemicals the Conspiracy is testing randomly on the populace.
 
        "Dreamland" (6 x 5) -- Part 1: Near Area 51, in a flash of light, Mulder's mind is switched with that of a Man in Black, who then begins to take over Mulder's life due to being exceptionally bored with his own.   Part 2: