The "one in, one out" rule states that for every item you buy, you must get rid of something else. The problem with this all-too-common commandment is that it's too constricting for some, and possibly not strict enough for others. Depending on your clutter situation, you might need to adopt a "one in, three out" mantra or just cut out buying new items altogether. Alternatively, you might wind up throwing away too much, resulting in having to continually purchase replacements. Instead, get in the habit of going through a room or drawer before you head to the store; you might end up finding what you need, eliminating the expense altogether.