Originally Posted by Shell925
Put a mark or piece of tape on your mirror where your rear tires are. That will help you make the turn without running up on a curb.
These type of "tricks" work well and do help. When we took the RV Driving school training, we learned to use small dots strategically placed on the inside of the windshield that serve to mark our front-end clearance and left turning apex. Knowing your front-end distance is as equally important particularly when navigating sharp right turns with perpendicular traffic.
Albeit we can navigate by experience now, the dots are still there as a quick point of reference when needed and we've yet to "bump" a rear wheel on a curb including while pulling our dinghy/toad.