Sadness is a sign you have not accepted where you are - replace this with gratitude for being given a challenge you can work with.
Sadness is victim thinking serves no purpose and drains you. Gratitude is a choice thinking - life is about choice so set goals you can work on. I do a exercise
if I am sad. (taught by sri srravishankar) sniff out sadness -sniff twice -http://www.Artofliving.Org.