Never look at just one side, cover all the sides. Focusing exclusively on one area might be dangerous. Poor observational abilities are the main cause of most small mishaps. Your ability to reverse properly will determine how well you do on your driving test. Since most human actions are rarely performed backward by nature, some more practice would be beneficial.
You will immediately fail a driving test if you inadvertently cross a solid white line. Turning should never be attempted, especially if a car is closely following you. If you overshoot the mark too far, you will need to carefully move backward to rectify it in order to avoid being hit by a car that you must yield to.