You don't have to live in an environment that looks like the TV show Hoarders to have clutter negatively affect your life. A cluttered car, home, office or desk slows our thinking, causes stress and can keep you from getting many of the things done that would lead to a better life.
Too much "stuff" collects in our lives because we don't put it away. And, it often literally takes only a few seconds to put something in its place.
Look around. Don't take a lot of time to decide, but find one thing that needs to be put away or thrown away.
Do it now.