Early on, I did an online search for ways to lower platelets, and then I talked to my doc. In my case, he said these were all good ideas and wouldn’t hurt, but not to go overboard.

1. Regular weight-bearing and stretching exercises. Not aerobic-style, but the recommendation for me was to do yoga. Now I work out formally 3-4 times weekly and try to walk outdoors or ride my bike a couple times a week. Sorry, but I can’t remember why not to raise my heart-rate, just that it was important not to – so ask your doc.
2. Reduce stress. Yea, not quite so easy, and also why yoga helps.
3. Homeopathic arnica. I take 30c/daily, which for me does not interfere with 81 mg aspirin/daily.
4. Diet: add some raw garlic a few times a week or daily. Best way I found was to smash a clove onto the side of a salad bowl, then mix in some good quality Italian olive oil and balsamic vinegar. Add greens and salt and pepper. Do NOT ever use canola oil. BTW: Cooked garlic does not have the same effect on platelets.
5. Good foods to be eaten frequently: Salmon, dark fruit (think Berries), mushrooms, cinnamon
6. Supplements: Ginseng, gingko biloba and resveratrol are supposed to help, but ask your doc about dosage.
7. Also ok in moderation is coffee (without sweetener or artificial stuff - I drink mine every morning with oat milk and sprinkle in some cinnamon) and a 5-oz glass of red wine at dinner/evening.

To this last one, I laughed! Who knew? Coffee and red wine make me smile.
My platelet count is holding in the 500's, and the hang-over headaches are now minimal.
Talk to your doc. Hope this helps 🙂