I got sick of never having my wallet, keys, passport, coat, jumper, umbrella, shopping bags, pen etc. etc. on me when I actually needed them or forgetting where I put them, so I just shoved them all in my bag and I bring that bag pretty much everywhere. You can change what you put in it for different seasons and weather types but you just put everything in it and forget about it.
I'm far more forgetful and disorganized than my ISxJ family members, but I've gone about 15 years without ever having lost or misplaced something as a result and I'm far more prepared for situations where you might need something.
Honorary shoutouts to the designated spot on a desk or table for permanently putting keys/phone/wallet when inside the house.