Maybe you could just set a goal of one room at a time. It will seem less overwhelming that way. Or you could commit to just cleaning out your closets and drawers to start with.
And when you clean your closets, why not buy matching hangers and then paint the wooden pole they hang on a lovely shade of lavendar? Designer Alexandra Stoddard calls little touches like this in the home "grace notes." We could all use a little more grace in our lives, even if we have to create it ourselves.