Japa

 Japa is chanting the Hare Krishna Maha Mantra, hare krishna hare krishna krishna krishna hare hare / hare rama hare rama rama rama hare hare. In ISKCON Srila Prabhupada set the standard that devotees should chant at least 16 rounds of japa per day. Without chanting on the Krishna bead one starts on the first bead next to the Krishna bead chanting the mantra once per bead to the other end then start at the end bead going back in the other direction etc. There are 108 beads on a strand of japa beads, so one chants the full mantra 108 x 16 times a day. One should also chant the Pancha-tattva Maha Mantra once at the beginning of each round: sri-krishna-chaitanya prabhu-nityananda sri-advaita gadadhara srivasadi-gaura-bhakta-vrinda.  Click here for a good resource: http://krishnastore.com/other-items-tulsi-japa-beads-om-69_72.html