So many things in life happen in the blink of an eye. It is easy to miss both big and small changes if your turn away for even a split second.
When you sit and watch the sun set, you realize just how quickly it sinks from a big ball in the sky to faint remnants of light resting below the horizon line. If you have time this evening, take a few quiet moments (It doesn't take many.) and watch the sun set. Photograph a moment that speaks to you.
If this doesn't work in your schedule keep your eyes open for the many other moments during your day that could be easily missed.