We all have bad days. I know that because you're reading this post. I once heard that the only people who don't have bad days are in the graveyard. And even then, for some of them, it only got worse...
I was recently listening to Michael Hyatt talk about handling setbacks and he referenced the notion that how we respond to challenges will set us up for future success or immediate defeat. The best indicator for how that will turn out are the questions we ask ourselves and maybe to others.