I try not to buy loads of stuff and be a mindful consumer so looking for things which you have bought and think really are the best things since sliced bread, or really are worth the money and not a flash in the pan. I'll start - two purchases of 2025 which have been brilliant.
Wool duvet - absolute revelation. So much nicer and cosier than the previous one which was polyester/plastic. Not particularly cheap at around £100 but SO worth it. Wish we'd bought one years ago.
Ring light which clips onto the top of your laptop screen, only about £15 but I look so much better on Zoom calls and don't have to contend with ceiling lights reflecting on the screen.