I have been an artist all of my life, whether it was painting, drawing or photography. There were times in my life where I didn't have the time, or the will to put camera to eye or pencil to paper. However, that didn't stop my me from painting in a mental frenzy, the yellow leaves on the most beautiful tree I have ever seen. Because I didn't act, I have to wait a year or more (as that tree is in Costa Rica) to capture the beauty of that tree, as the yellow leaves only last 3 days before they fall to the ground.
Lesson learned; live in the moment. Don't count on tomorrow, as it may never come. Don't pass up the chance to photograph YOUR yellow tree or to actually paint the canvas you paint in your mind when you can't sleep.
Most importantly, show the ones you love just how much you love them, as they may not be here tomorrow; just like the yellow leaves on that beautiful tree.