What effect does reciting any name of Allah have upon your lives, soul heart and hereafter? how can we attain the maximum benefit? And if we want to recite some zikr, how can we find the benefit it has, and its effects, if it is not written in the books?

Please go through this link here it has written the benefits of reciting Asma al Husna.
http://www.duas.org/downloads/asmaaul%20husna_dayof%20week.pdf