And in times when that seems excessively difficult, watch this:
If that still doesn't inspire a shift to the proper perspective, try a little music that calms the soul. After all, someone did say that classical music can bring one closer to God, presumably because it inspires contemplation. How can one contemplate life's essentials and not arrive at the Author of Life?
If it happens to be a bad day, and being a dark cloud seems more appealing, just look at this: