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Meditation Station
The official website of the Meditation Society of America offers information on what constitutes meditation with 108 meditation techniques, meditation classes, and links to related sites.
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Meditation Therapy: Brief Instructions for Seated Meditation
A set of instructions for seated Zen meditation.
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American Meditation Institute: A Systematic Procedure for Meditation
The American Meditation Institute for Yoga Science & Philosophy provides this step-by-step procedure on how to meditate.