If you have to go somewhere, and need to have something with you,
don't put it by the door.
put it in the car instead.
I have walked past my take-with-you pile so many times. I've even stepped over it. Obviously this is if you are driving to your destination and the item isn't perishable.
When you arrive at your destination, it is so much better to say, "Be right back, I left it in the car." vs. "Ugh, I forgot it at home."
*Grammar edit: This tip would work well for a book, not "...isn't perishable, like a book".
Can't be arsed to walk to the car or don't have one?
Lock your door. Put everything you need to take with you with your keys. Unless you climb out the windows it should be very hard to forget the pile.
But then I forget my Keys, and you really shouldn't lock yourself in your own home, because in case of a fire or other emergency, you have to remember your keys and it takes longer to leave.
That's a good point but I'm taking the gamble. Fire is super rare while locking myself out is super common. Also I'm living in windows jumpable height.