Even five minutes of meditation a day can help you refresh and calm your mind. Although this is easy to do on your own, you can check out this guided meditation podcast.
2. Read a short story
No time for long novels? Here's a list of short stories for a quick pick-me-up.
3. Surround yourself with nature
Have some tea in your garden or buy a small potted plant, the possibilities are endless. Take some time to step back to see the beauty of nature surrounding you.