Give old stuff new life with smart, simple upgrades. (iStock) When the urge to refresh your space hits, don’t rush to toss out the old stuff. A few smart, affordable upgrades can make the items you already own feel brand new again. Brighten dingy tile with a  grout pen , add  under cabinet lighting to breathe life into your kitchen or freshen up an old couch with new  throw pillow covers . These small fixes can make a big impact and won't cost you much.  Grout pen: $9.98 (9% off) Original price: