" Gratitude Improves Activity in Dopamine Circuits. The benefits of gratitude start with the dopamine system, because feeling grateful activates the brain stem region that produces dopamine. Additionally, gratitude toward others increases activity in social dopamine circuits, which makes social interactions more enjoyable. Keep a gratitude journal. Take a few minutes every day to write down three things you’re grateful for. To make it a better habit, try doing it at the same time every day. If you can’t think of three things, just write one. If you can’t think of even one thing, just write, “I’m grateful for the food I ate today” or “I’m grateful for the clothes I’m wearing.” Even if a situation is 90 percent what you don’t want, you can still be grateful for the other 10 percent. "

― Alex Korb , The Upward Spiral: Using Neuroscience to Reverse the Course of Depression, One Small Change at a Time