Right vidhi should be to be followed whilst activating the mantra. According the Purohits, a person should chant bare minimum of 21 malas or 2268 instances followed by the chant of dashansh homam (i.e. one particular tenth of the overall chants). Though performing the homam, remember to hold a kalash https://www.youtube.com/watch?v=qnEcMQtKTvg