Here is what works for me. Through the summer especially in the fall i'm on the lookout for rock, sticks, boards etc that might get caught up in the blower. These get removed when I see them. Usually the first snow does not get removed but gets packed down and hopefully frozen. I also set the shoes on the blower lower early in the season. When the ground freezes, I raise the shoes accordingly. Also, I have extra shear bolts, they work but prevention is more better.
