Assalamu alaikum!
It is very good question.
Mostly, it has been my father who has been my mentor, but I also had some very good teachers during school and uni times whose advice has been of great help.
I was exposed to the Islamic teachings from very young age, alhamdulellah.
Eventhough, I have not benefited from that as much i should have, but it has almost always been, from very childhoood, a dominant force in my way of living, thinking and behaving.
It is scary for me to imagine what other forces would rule my toughts and actions had i not been born in a muslim family and envirnoment. I thank Allah almighty.
I ask Allah s.w.t to grant me and you all hidayah, ameen
Wassalam