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Mistake #3: Keeping that $45 face cream, even though you hate the way it smells.
Pro organizers are used to seeing abandoned, barely-used or half-full bottles of moisturizer, sunscreen and facial serum in bathroom cabinets, and it's typically not because clients have simply forgotten about them. Andrew Mellen, an organization expert, speaker and the author of Unstuff Your Life, says the people he works with frequently tell him they spent so much money on a product, that even though they don't like it, they feel guilty throwing it away. Clutter isn't the only reason to toss products you're not using, though: many of the products actually expire way sooner than you might think. If you've already opened, say, a tube of anti-aging cream with retinol, it's only good for a year.