Things like a small arrangement of flowers ($4 at my local grocery). Having supper on the good china. A cup of hot tea on a cold day. Snuggling with the one you love.
Hardly significant in the big scheme of things, but necessary just the same. They can can make a difficult day a little better. And they are things you can do for yourself, instead of waiting on someone else to do.
There is so much stress and unpleasantness in life, it’s important to do little things that bring happiness.
So what small thing can you do today that will make you smile?