Ok so apart from dogs...
Great coffee, first thing in the morning with the papers on my ipad and the luxury of time to do the crosswords.
My bed. An electric blanket, great pillows, good quality bedlinen and a comfy mattress.
Treating myself to lots of good books on my favourite subjects.
Some new pyjamas that are soft and comfy.
Listening to great music.
A beautifully mixed cocktail in a lovely glass.
Fresh flowers on the table, just for the hell of it.
Having a pile of good magazines (or a subscription to Readly which gives you TONS of online magazines on every topic under the sun, including back issues, really cheaply. Great value for money.)
A long walk on a perfect autumn day somewhere with spectacular scenery.
Actually a lovely long walk anywhere at any time of year is always good for the soul. Invest in some decent walking shoes/boots and clothing, maybe join a local group if you like the company, but just get out and walk in nature. There is nothing like it.
The Lake District. The West Highlands of Scotland. Cornwall. The North Norfolk coast. California. If you can't get to any of those beautiful places then watch travel and nature videos of the scenery on youtube with nice music in the background.
My caravan. The cosiness and simplicity of it and the flexibility/spontaneity it gives us to go all over the UK quite cheaply at the drop of a hat.
A home baked loaf or cake.
A log fire, candles, blankets, either coffee or wine.
My garden in May and June. Pottering around dead heading, early in the morning before the day starts. Watching the bees and the butterflies. Catching the scent of roses or jasmine as you walk past.
A hot bath with lovely oils or bubbles.
A Sunday roast all made from scratch. Even the faff of it is very therapeutic.
Having a hobby that you love and that completely immerses you and gives you fulfilment.
Also. Did I say a dog? Hell, just get three dogs. If you can't get a dog then volunteer at a shelter. Just visit them, walk them, pet them, play with them, chat to them. They boost your seratonin massively just by being there in the room with you and listening intently like they understand every word.