A.H.
For keys you could attach a key finder :) Also making a hook by the door that the kids can't reach so it won't be much thought to just stick them up there. I have usual places but when you don't put them there it's a 30 min or more frenzy trying to remember where ya put them haha. For packing stuff I triple check everything. I write a list of what we need, pack it by the list, then double check and think for a moment of the actual trip... like going to the pool, I start picturing it in my head, like okay we're at the pool she will need sunscreen for the sun burn, a float for the water, etc and then I'm like oh duh she needs sandals. It works for me :)