I realize this can't apply in every situation, but often, a simple choice to "accentuate the positive" can change how we see our circumstances.

Tomorrow morning, choose to wake up and smile. Then choose to be uplifting and complimentary to family, friends, coworkers, and strangers. After that, choose to serve someone. Finally, choose to thank the Lord for all the good things you saw that day. Again, I know that some circumstances can't be overcome with a smile, but when you choose your outlook you'll feel empowered to face and then push through the difficulties outside of your control.