As that is a Swyama Siddha Hanuman Mantra it doesn't have to get chanted for a set quantity of Mantra Repetitions for being able to utilize it. Distinctive worship and rituals and procedures about way, sitting down mat, and counting rosary will not be advised for chanting this Hanuman Mantra. https://zandervlanb.blogzet.com/not-known-details-about-hanuman-shabar-mantra-get-rid-of-all-problems-47133927