This 2-minute video from Adorama highlights one super-simple tip that could make your life behind the camera a little easier.
Most photographers close one eye when looking through the viewfinder, but keeping the other open allows you to remain aware of your surroundings. It means you can see things coming into your frame, keeping you ready to press the shutter at exactly the right moment.
This works for street, wildlife, and even portrait photographers. For the latter, it can help to maintain engagement with the subject, as you appear to still be looking at them and not just through the camera.
It may seem overly simple, but try it out. Once your brain is used to the slightly strange adjustment, you might find it becomes totally natural to you.