How do you pick yourself up after falling down?

I’ve been having a rough past couple of weeks. My veil went missing, my flower girls mother is being difficult, my fridge broke, my dog has been leaving me “gifts” in his crate when I come home, and I’ve been pretty low on cash. All in all, nothing seems to be going good. I’m trying to keep my head up, but more and more bad things keep coming my way. How do you stay positive during tough times? Any advice on how to steer clear of going into a depression (which I tend to do during times like these)?