A website called Calm.com has videos of nature scenes and a woman’s voice doing guided meditation. I’ve used the site many times and find it very relaxing. As you’re watching the video, focus only on the video and nothing else. You can decide which scene you want to watch, and can press pause if you don’t need to listen to the guided imagery.
Use it as a break from your day, or a time to relax after a stressful day. Or anytime you need it.