She almost regularly keeps two pairs of jeans -- one skinny, one bootcut -- from one season to the next, because everyone needs jeans! And they're suitable for different occasions.
Weather matters, of course, so she chooses her items with the changing seasons in mind.
She does not get rid of her all clothing; whatever is not in her capsule goes into storage. At the end of a cycle, whatever she did not wear at least once gets donated.
Versatile accessories like scarves are key to creating new looks from the same pieces.