The "junk drawer" has become a universally acknowledged space where you store all the things that doesn't seem to have a place. It is not always a drawer - it could be a room, box, or a corner in the attic.
In truth, most of us have one, and almost none of us know how to deal with it.
The Life-Changing Magic of Tidying Up: The Japanese Art of Decluttering and Organizing explores how putting your space in order causes "correspondingly dramatic changes in lifestyle and perspective." Marie Kondo, the author, recommends that you defy conventional wisdom and start by discarding and only then thoroughly organize your space in one go.
This is probably one of the shortest-but most useful-posts you'll find on the KonMari Method. It's taken straight from the source, and you can also read a summary of Marie Kondo's book here: This post is meant to be a quick reference guide or cheat sheet that you can bookmark and come back to without having to get lost in the details in other posts.