Personally, I think that one cannot fully appreciate the big happenings of life without first being grateful for all the small things. Sometimes, the small things in life are what catalyze the larger happening to begin with.
Also, I do feel that the little things in life are ever so precious because they can brigthen one's day so easily and effortlessly sometimes. Often, we remember the little things like one's first kiss, a trip to the grocery store with one's significant other, or just sitting on a porch swing outside on a lovely, crisp fall day. These little events add up to be so much more. They are the memories we cherish for the rest of our lives.