So much energy is wasted on negative thoughts. I find that when i do allow negative thoughts to consume my consciousness, that mind set will literally pin me down making me totally inactive. This doesn't happen to often, as I am a glass half full kind of person. Many times when negative thoughts tend to creep into my mind, I will repeat this line from Desiderata. "Do not distress yourself with dark imaginings"
Gratitude is a very powerful way of giving, and who doesn't feel good when they are a giver instead of a receiver!