Here's a thought; quite often, what they mean by 'mindfulness' is actually 'mindlessness'. Like doing colouring books, or, in my case, playing freecell on the computer. And quite a lot of my knitting projects are selected for their 'mindless' qualities. I did see an expensive scarf knitting kit on a 'lifestyle' website; for a substantial amount of money you got a ball of wool which changed colour at regular intervals and a pair of needles. The idea is that you sit and knit (with or without the company of soft music and candle) until the wool changed colour. Then you will feel - however you feel - presumable all calm and refreshed.
I like mindless knitting that I can do while watching television or listening to the radio or a book. I'm not so experienced that I can knit and read a book like some people I know.
The mitred square blanket is an excellent project for mindless knitting. You just need a basket of wool - bought for the purpose or left over, and suitable needles.
I made one as an experiment as and use it to protect the settee from the cat that usually sleeps there;
No, not that cat, the other cat. I followed the instructions to begin with, using thinnish wool and 3.5mm needles. However I kept getting confused as to which row I was on. And my diagonal patterns were all inconsistent. Then I had two brainwaves; I decided not to care about he direction of the diagonals, and I adapted the instructions so that it every row followed the same process. So once you have the right number of stitches on the needle (in my case 40) and the mark placed in between the 20th and 21st stitch, proceed as follows;
Knit to marker, slip marker, knit two stitches together to decrease by one stitch, knit the to the end. That's it. When you end up with just two stitches, get rid of the marker, pass one stitch over the other, cut the yarn leaving a tail of a couple of inches to be darned in later and pull this tail through the remaining stitch to secure. I did have hundreds (so it seemed) of tails to sew in later, but I notice on another blog the knitter just 'knitted in the tails as she went along'. Interesting idea for the future.
I had about 5 balls of double knitting, all part used, all left over from various ideas and projects. So, I have been mindlessly knitting for a while on sweet little short 4mm needles, whenever I was in the mood. It doesn't take all that long to complete a square.