A letter (Nov 2000) written by my Uncle, who lived alone (with assistance from nearby relatives) listed the adjustments he was making:

• A “new” year old car with auto trans

• Remodel bathroom with 30” door, wheelchair accessible shower and grab bars

• Commercial carpet

• Handrails in hall ,porch, and along walk to sidewalk.

• Power lift recliner chair

• Several grab bars

• Lever door knobs 

 I've found that the following help: 

• Smart phone -- store photos of med list, notes from last doctors visit, etc.; track taking meds; use alarm, etc.

• Night light -- Place a 25 watt equivalent LED bulb in a central fixture and leave it on all night or use a voice controlled lamp, as via Alexa.  Especially critical if you have pets -- sleeping dogs are a trip hazard.

• Sling pack, single strap, allows access storage by swinging the pack to the front without removing it-- include extra meds, small "candy bar" power pack (for phone), small first aid kit, Swiss Army knife (as "tinkerer" model) or multi-tool (substitute "travel legal" scissors if flying), water bottle, etc.  Smaller "travel pack" is handy for daily use, Llarger "fly fishing" sling pack is good for travel -- room for a parka or down vest, added Velcro to hold cane.   (photo) 

• Bed height -- Approximately chair height, remove/replace the springs/foundation under your mattress. We used a wood slat unit from Ikea.  Plywood or OSB on 2x3s will work.  Lowes or Home Depot will cut the material to length.   (photo) 

• Mattress -- Rather firm, to facilitate movement.  As -- 2" of soft foam over 5" of extra firm foam.  Memory foam may not work.  (I use 3" of medium foam over 3" of firm foam from:  Foambymail      

• Vehicle -- Smaller SUV or mini-van -- We have a Subaru Forester -- easy entry and exit, large windows - visibility, automatic transmission, multiple safety features etc.  Make the transition while you are still comfortable driving a new vehicle.

• Schedule -- as levodopa becomes more important, you may need to set alarms on your phone 

• Pill boxes -- Having pills pre-counted (by day, for a week) gives you a reference -- did you take your last C/L?  When you are taking it 5x daily, it is easy to get distracted and lose track of what you did.

More to be added.