It'll make their day and make you feel a whole lot better. You never know how much a simple smile can affect someone, it could be the only act of kindness they see or receive that day.
2. Take some time out to do something that you enjoy
Whether it's reading a book, watching a film or TV show or something completely out of the ordinary, it's good to do something that you know will make you happy.
3. Take a walk
It doesn't have to be long, or with any particular destination planned. Just go to the corner shop or wander aimlessly if you have to. Get some fresh air and have some time to think.
4. Take some pictures
I love taking pictures. It makes me feel like I'm more artistic than I actually am. And it's fun and relaxing, which is always a plus.
5. Go outside and close your eyes
Listen to the sounds of the world. To people and nature. Let your mind wander - it's amazing where it can lead you when it has the chance.