Same, cat food on a worktop in the futility because otherwise dogs will eat it.
For the luddites like me who dont have WhatsApp you can email yourself and or text yourself.
Last job had so many 4 digit codes, all different, no chance I could ever remember them. In the first instance I would text myself the latest 4 digit code, then once not super busy I'd transfer to an email. The email would just be updated from then on. I think its labelled as WORK DOOR CODES, capital letters so easy to find.
Passports, just get each person a different colour holder? Or washi tape.
The charity shop bag deffo keeps the crap from accumulating. If I buy something cheap enough it's not worth sending back or will be a pain to return and I dont like it, it goes with tags still on into the bag. However the bag then stays because fewer charity shops are open when I have time to take stuff. I end up with 3 or 4 bags full until I have time.