Methodologies
- Hallucinogens and especially psychedelics like LSD, DMT, psilocybin mushrooms, and Peyote, but also dissociatives like ketamine (famously used in psychonautic endeavors by John C. Lilly), DXM, and Salvia divinorum
- Disruption of psychological and physiological processes required for usual mental states - sleep deprivation, fasting, sensory deprivation, oxygen deprivation/smoke inhalation, holotropic breathwork
- Ritual, both as a means of inducing an altered state, and also for practical purposes of grounding and of obtaining suitable focus and intention
- Dreaming, in particular lucid dreaming in which the person retains a degree of volition and awareness, and dream journals
- Hypnosis
- Meditation
- Meditative or trance inducing dance, like Sufi whirling can also be used to induce altered state of consciousness
- Prayer
- Biofeedback and other devices that change neural activity in the brain (brainwave entrainment) by means of light, sound, or electrical impulses, including: mind machines, dreamachines, binaural beats, and cranial electrotherapy stimulation
These may be used in combination; for example traditions such as shamanism may combine ritual, fasting, and hallucinogenic substances.
Read more about this topic: Psychonautic