I am taking a trip soon to London and will possibly be adding a couple days in Paris. It's been a hot minute (few years) since visiting the UK and would like to solicit some timely advice and tips. One thing that comes to mind: How important is it to carry cash? Would I need to pay London and Paris street vendors or any shops with cash or will a card with no exchange fees suffice? While we will of course be visiting some tourist attractions like museums, most of our time will be taken up with book stores, record shops, food and coffee shops.

For the first time in my life, I'll be living somewhere other than my hometown— going half the world away to London!

Having never moved further than like an hour away from where I grew up, I'd love to hear about experiences, tips, things to keep in mind when moving to a totally new place. Anything centred on London/the UK is of course very welcome, but I'm also really into hearing from people more generally :)