The first method: find a corner and stand by, fix the left and right shoulders, and then use the left and right ears to drive the image to move to both sides. It's simple! It's ok to practice more!
Two: Turn your head to one side. Don't move your neck after tilting, then put your head upright, both sides are the same, mainly practice more.
Three: Stand in the corner with your back to the corner. Find someone to hold your shoulders with both hands, and then you move your head left and right. Try to stay still. You can take your time and practice more at first.