The antonyms for "mis-arranged" are "organized," "systematized," "neat," "orderly," and "sorted." To organize is to arrange in a particular way so that it is easy to find or use something. Systematized means to put things in order according to the system. Neat is the opposite of untidy, and it means everything is in the proper place. Orderly means arranged in order or methodically. Sorted means arranged according to the category, size or importance. Therefore, if you want to reduce the chaos around you, organize your things, systematize your routine, keep your surroundings neat, be orderly in your work, and sort your things to reduce the clutter.