Changing doorknobs to levers
Adding higher wattage lighting
Grab bars for toilets and showers
Ramps for wheelchairs and walkers
Walk-in shower

Lazy Susan for easier access
Highlight changes in grade
Repair cracks in walkways
Widening of doorways
Lowering doorway thresholds

Leveling floors
Install sliding and pull shelves
Lowering countertops
Changing drawer pulls
Raising toilet seat height