Ok, as a writer, kudos for putting a good book as the first item on your list, well done :)
As much as I hate fiat, until the crypto revolution is realized, I'd say having a little bundle of extra cash stowed away somewhere is always a good idea. Sht always seems to want to happen, money seems to lubricate much sht away ;)
RE: 4 THINGS YOU MUST DO WITHOUT DOUBT IN YOUR SUITCASE IF YOU ARE TRAVELING