ATPIELI aside: So I spent eighteen months in Asia/Europe/the States in about fourteen countries all told. Must have reformatted my (mental) harddisk, as I have only the vaguest recollection of addresses (Victoria Street in Singapore, behind Wildschut in Amsterdam Zuid). I had an accommodation address in Highgate N6 as it was before the internet and my friend N was getting all my bank statements. And my belongings/furniture were farmed out all over North London. I lost my list while I was away, and every so often, even now, someone says to me: "my Mum has some of your junk in her garage".
Lesson learned: you need way less stuff than you think.