As of 2015, free instruction on how to practice transcendental meditation is available on DeeperMeditation.net. Information about the practice and purpose of transcendental meditation is available on FreeMeditation.com. A list of popular mantras used in transcendental meditation are available on CAIC.org.au.
Transcendental meditation is a type of mantra meditation, it employs the technique of verbal repetition of a "mantra" to settle the body. Any one- or two-syllable word can be chosen at random, as it has no real meaning, only purpose.
The David Lynch Foundation is an organization that uses this type of meditation to heal stress-related trauma victims and help raise performance levels of at-risk populations.