Stories demonstrating zeal in observing Halacha – the true definition of Yiras Shamayim, are my favorite:
Rabbi Yaakov Galinsky was once walking on Shabbos on the street and reached into his pocket for something. When he took it out he realized it was Muktzeh, and immediately dropped it.
“Grandfather”, asked his grandson who was accompanying him, “why didn’t you throw it into a dark corner to keep it safe?”
Rabbi Galinsky answered: The first instant one should let go of it, because if you wait, the Yetzer Hara may get the better of you!