L’occitane hand cream. It’s expensive but you’ll never look back. Get a set of the small ones and place where you’ll see them often (by soap in kitchen/in your car/handbag/desk etc).
Another vote for fresh flowers. I’m loving £1 a bunch daffodils right now. Supermarket gladioli also good when in season.
Self-heating eyemasks - sooo relaxing.
I pay £6 a month not to get adverts on ITVX. Money sooo well spent.
I alternate subscriptions (when I can afford them) - flowers/candles/beauty boxes - it’s lovely to get a “gift” every month and there’s loads of good introductory offers.
Change your alarm on your phone so you wake up to a favourite song instead of a blaring alarm.
Invest in a slow cooker and research recipes. Coming home to a house that smells of dinner is amazing when you live alone!
Switch pictures round on your walls. It’s amazing how a small change in perspective can alter the space.
Get a light on a timer so that you come home to a cosy house (great to deter burglars too).
Put all the boring essentials onto Amazon subscription so that you never have to worry about remembering to buy sink unblocker or toilet roll. It’s rubbish running out of stuff when you live alone and don’t have anyone to bribe to go to the shop for you!