Put your phone or purse in the backseat next to baby so u have to reach by baby to grab it thus reminding yourself

Download an app and getting a tracker thing to attatch to the carseat that beeps when ur car shuts off or gets too far from the carseat/tracker..

New cars w weight sensors in the back that beep at u til u grab babe

I just think its ridiculous that forgetting your child is that much of an issue but people remember their phones and/or purses..