I suspect that Faith would have its value in the mundane. Still, In my case I apply it to God as an unshakeable belief in Something Higher, the evidence of things unseen. This Faith is further augmented by my Meditation of some 32 years, as my inner vessel is generally receptive to Higher forces from above.
Now for the second part of your question, I have been taught to chant the word Supreme if in difficulty. I had to do this once two years ago, and sometimes in dreams too. Still, this was a real live case and I was on the verge of being attacked. I simply looked up, and chanted the Supreme with folded hands, and the attacker got scared and walked away.
I was also lost in Austria for nearly four hours. I had faith and so asked for help from my Guru. Two of my Austrian friends were going home and stopped directly in front of me. They told me that they had done this route many times and never got lost. On this particular day, they took a wrong turning, and ended up exactly where I was. I had faith in my Guru, and this is what happened.
My mother had faith that she would be dead in two days. So she told my brother to call us all from different countries so we could go home. He took it as a joke. By the time I got the message two days later, she was already dead. God bless her soul in heaven.