A former professional closet organizer, Kim, 30, shares her top tips: "Always use the same style of hangers throughout," she says, recommending Real Simple Solutions Slimline flocked hangers. Dresses are arranged long to short, and jackets are sorted by texture. And to create a boutique-like vibe, she likes to "showcase the most beautiful" pieces. She also says to "hide T-shirts in a cupboard or drawer. It's so hard to keep them nicely folded." Finally, toss anything that doesn't fit. "I sell those pieces on eBay and donate the proceeds," she says.