Sensory Deprivation: Meditating In An Isolation Chamber
An isolation chamber, or tank, is a capsule in which subjects float in salt water at skin temperature and without any light. These tanks are used for meditation and relaxation, sometimes with a bent on alternative medicine.
Have you considered entering an isolation tank? It can be a real trip. It's not some new-age fad though. It's actually a pretty old practice. From Wikipedia:
“John C. Lilly, a medical practitioner and neuro-psychiatrist, developed the flotation tank in 1954. During his training in psychoanalysis at the US National Institute of Mental Health (NIMH), Lilly commenced experiments with sensory deprivation. In neurophysiology, there had been an open question as to what keeps the brain going and the origin of its energy sources. One hypothesis was that the energy sources are biological and internal and do not depend upon the outside environment. It was argued that if all stimuli are cut off to the brain then the brain would go to sleep. Lilly decided to test this hypothesis and, with this in mind, created an environment which totally isolated an individual from external stimulation. From here, he studied the origin of consciousness and its relation to the brain.
Peter Suedfeld and Roderick Borrie of the University of British Columbia began experimenting on the therapeutic benefits of flotation tank usage in the late 1970s. They named their technique “Restricted Environmental Stimulation Therapy” (REST).