How can I get rid of all this clutter?

Take a look at the things taking up space on your tabletops, on shelves and in closets. If it's not giving you pleasure and is not useful, get rid of it. Either throw it away or give it away. Now that you have gained some empty spaces, put away those things for which you previously had no place. Tidying up and cleaning up are much easier when you have ample storage and fairly clear surfaces to clean.