Came across this great new product for parking your vehicle in the garage. There are a number of these we have tried but this is engineered by the company that makes the laser system that perfectly lines all the cars in a row at a car dealer! It is using rear beam vs front of vehicle. See video demonstration and link. 1 car system starts at $89. http://www.park-daddy.com https://youtu.be/Geh1H5jc3ik
I use a 3" long piece of blue painter's tape posted vertically on the garage wall, strategically placed in plain view out the right side window. It says "STOP HERE!" My investment cost next to nothing to help my wife keep from having an issue. "Priceless", I guess you could say.