Surat Shabd yoga gurus recommend that meditation be performed early in the morning and in the evening before going to sleep. The yogi should assume a comfortable position with a straight back. Some of the suitable postures for meditation include sukhasana, varjasana or muktasana.
Simran refers to repetiton of the mantra, given during the initiation by the satguru. During bhajan, all external sounds should be blocked as the yogi concentrates on his/her ajna chakra and listens to the inner sounds of the Self.
After completing simran, dhyana and bhajan, union is achieved and the yogi connects with the celestial sounds and the sacred light.