Boleslaw Sobieszek
Boleslaw Sobieszek voted up Anonymous' answer

In my opinion, one of the most important things is to make bathroom improvements: Bathtub grab bar, shower chair, etc. People prefer to stay independent in this intimate questions.At the same time it will be more secure.
Pretty good list you can find here: www.gardens-springshadows.com/home-safety-tips-for-seniors/