As I lie in bed at night, I practice a simple gratitude meditation before I fall asleep. For about five minutes, I review my day, and focus on a few things that I am thankful for (trash cans, toilet paper, healthy toenails). It is not as important what my gratitude is about (whether it something small, like the London transport working, or something big, like the London transport working), but that my feelings are genuine (like when the London transport is working).
If I can foster these feelings of gratitude, then I sleep more deeply, and when I wake up the next morning I am centered and excited to start my day. How my day starts has a huge impact on the rest of my day. If I wake up feeling grumpy, for example, the London transport usually breaks down. So if 5 minutes or reflection can keep my underground running, how can I resist?