Uses for leftover mustard, ketchup and salsa; a dose of R&R at the spa or at home; creating an efficient home office; profile of an energetic 83-year-old; surprising new uses for floss.

MEALS MADE EASY: Put your almost-empty condiments to good use with recipes from Real Simple's Anne-Marie O'Neill, who starts with leftover mustard, ketchup and salsa. KNOW HOW: Get a dose of R&R - at the spa or at home - with simple and relaxing tips and techniques from Lia Rowland, spa director at the Four Seasons. HOME SOLUTIONS: Create an efficient home office with smart organizing solutions from style expert Elizabeth Mayhew. PERSONAL PROFILE: Energetic 83-year-old Grace Salant fills her days working, volunteering, exercising and much more. Plus: viewers share their smartest investment; surprising new uses for floss.