All very good and compelling answers & suggestions. Yes, of course exercise is what you need to do as much as possible. Even if that means simply taking a 30 minute walk. The best person to get advice on exercise would be your doctor. As it was already mentioned, everyone is different in the PD world.
Medications... that's the hardest part for most of us. I am 50 years old and was diagnosed five years ago. The neurologist started me Azilect. It appeared to be helping, but only for a few months. Also, be sure to look at the Azilect website and research the interactions it has and the OTC meds you cannot take while on Azilect. If get a cold, cough, etc, you can't take them. Dextromathorathan, in most cough/cold medicine.
Currently I take 2 Carbidopa/Levodopa 25-100mg. 4X a day & Comtan 200mg. also 4X a day. You'll find the more you research and ask others, everyone takes some combination of medicine that works best for their particular situation.
I wish you well and don't give up!....Ever!