LPT: If you are prone to forgetting things when you leave your house, put your keys on top of the items you want to bring so you have to see them before you leave.

I constantly forget items on the way to work, so I started doing this every night before I go to bed a few months ago. It forced me to visually see the things I would have forgotten, and after a while just the process of doing it was enough to help me remember.