My wife just went up even further in my estimation of her organisational skills.
Not only has she thought about buying some postcards, not only has she bought them and not only has she also written them out, but guess what?
She has fetched some pre-prepared hand written address labels to stick on them.
When I asked about them she pointed out that this way she didn't have to pack the address book, we fetched our baggage allowance carefully calculated to the ultimate gram, neither did she have to write the addresses down so that she could then write them on the cards.
This way she simply stuck on the labels, wrote her "wish you were here"s and she was done.