Strange one for a 67 year old ... I go rock climbing. Focuses the mind away from the stresses & strains of having a 7 year old granddaughter in residence. Then I return, exhausted for a hot bath & good night's sleep.
I used to relax in a bath with a book but my new landlord removed the bth and put in a shower in the two days between my 2nd viewing and my moving in so now I read (not in the bath!) or watch old episodes of strictly while catching up on my knitting
I go for a walk - the physical activity seems to occupy that bit of my brain that needs to do something but the steady rhythm is strangely relaxing. It's always preferable walking in a natural environment but even local streets can do the trick.
Definitely good book(s) for me and during this gorgeous summer have relaxed with a cup of tea, the book(s) and sitting on our patio admiring our garden and listening to the birds.
I unwind by long soak in the bath, Epsom salts as I'm infected with Lyme Disease, whilst listening to the radio. The chitchat helps me unwind and relax and forget my problems.
Walking down to the beach and picking up all the marvelous treasures the sea has brought in. I have a nice relaxing walk in the sunshine and come back with a little bag of treasures. I then sit down with a coffee and sort through my bag, what bliss.
I have an allotment and I find working on it to be totally relaxing and stress free. When the weather is bad I dress appropriately and go for a bird watching walk. If it is really bad I curl up with a good book.