We've all got a lot of stuff. It just sort of creeps up on you. Eventually, everyone realizes that they need to get organized. However, yearning for organization should not be considered a license to go out and buy all those clever plastic bins and modular closet shelving.
Instead, getting your life and home in order starts with one simple action. Before you do anything else, stop adding to the problem. As big as it is you need to keep it from getting any larger.