"... a whole range of hands-on activities — such as knitting, gardening and coloring — are associated with cognitive and emotional benefits, including improvements in memory and attention, as well as reductions in anxiety and depression symptoms."
I recall too that Jeeves wrote about a friend who found relief in making things in wood.
I wonder if playing the guitar helps? I still play guitar - although it is getting harder to do.
”Make it your goal to live a quiet life, minding your own business and working with your hands, just as we instructed
Recommended a long time ago by my friend named paul
my husband draws with pen, really detailed drawings, he used to draw many years ago and took it up again about 3 years ago. Tremor stops when he draws although it’s not one of his worst symptoms. Here are a few of his drawings
But no amount of working with your hands will undo the damage done by bad diets containing indutrially refined foods like seed oils and carbohydrates.
Electric Hand Massager
Nutrients to help repair your blood-brain barrier
Did PD start on your right side or left side? 
New guy with PD -- How effective is your meds at controlling tremors?
