Bath, do a hair treatment with coconut oil (bought from b&m or similar), clean pjs and clean sheets.
Lie in with cup of tea and a book. Or cuppa and book in the garden on a sunny day.
If you have amazon prime you can get prime music included, gives you an app a bit like Spotify - I like to choose a random playlist on there - new (to me) music but ‘free’ or at least doesn’t cost any extra than what I’d already be paying.
Hot chocolate before bed.
Got some really amazing vintage cheddar in M&S last week had been over £4 reduced to 40p as it was the sell by date, but it’s still absolutely fine - there’s only some left because we’ve been so strict with ourselves, it’s so so tasty.
Superdrug version of the Liz Earle hot cloth cleanser, cheap as chips and not hugely different to the expensive version.
Smothering myself in cocoa butter body lotion, I’m using an Avon one at the moment which was only a few quid.
I bought a huge bumper pack of Korean sheet masks from amazon ages ago, probably worked out as about 50p each. They’re lovely and leave my skin very moisturised and glowy.
A little blackcurrant tart from the bakery.
Lidl can of G&T - fintons it’s called. Not a luxury brand but perfectly drinkable for 85p or so. Also the Lidl or Aldi version of mini magnums.