I installed one of those park-smart wheel chalks on the floor to give my wife a target. She seems to consistently hit the mark now, but her car is also pretty small.
I also ended up swapping spaces so her driver door open towards the wall vs. my Cobra. I'd prefer to be on the other side of the garage, but I don't want to take any chances
I keep tell my wife to back straight out of the driveway, because the curb is a little narrower than our driveway. I cringe when I see the tire on her car going off the curb and the spoiler narrowly missing the curb.
Age old problem my friend.