Overview
There are many ways to make your home comfortable and easy to live in. This page from Careforth supplies a general list of things you can do to make your abode work well for you. It includes everything from free fixes (such as brighter lighting or eliminating excess power cords) to more substantial changes like improving stair support or rethinking kitchen storage.
For a more in-depth look at possible modifications, go the the AARP Homefit link.
If you're just looking for an overview of ideas, take a look at this Careforth page.