As this is the Swyama Siddha Hanuman Mantra it does not have for being chanted for a set variety of Mantra Repetitions for being able to use it. Special worship and rituals and procedures regarding way, sitting mat, and counting rosary usually are not suggested for chanting this Hanuman Mantra. https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s