So, the problem is those pesky U-turns from a stop.
Try practicing by stopping in a parking lot with your left foot on a devider line. Now you can look along that line and know you are looking 90-degrees left. Look back to the end of that line 3 spaces over, and you know you are looking at least 135-degrees behind you. Even better, you have a specific focus point, not an area or a zone, a real visual anchor.
Start doing turns in 3 parking spaces, then see if you can work it down to 2 parking spots.