My son has totally embraced technological tools for organization. That doesn't help when he makes his water jug for his sport practice and then walks out the door without it. Luckily those types of things are now random and he pretty much has it together.

He gets irritated with me as I run through a checklist out loud as I sit in the car to go somewhere (cell phone, umbrella, backpack, library books to return, etc.) and then start in on him and things I want to make sure he has (like his water) but that is how I work...he wants me to use my phone instead.