This month, we've been rethinking the way we use resources, including space. Space is always valuable, always limited and we're constantly searching for ways to make the most of it. Flexible furniture like Philippe Starck's Prince Aha Stool ($87 at Design Within Reach) is one way to maximize space. It's usable inside or outdoors as a side table or stool, and the inside opens up for storage. We love hard-working furniture that can adapt as our apartments (and lives) change. Any other suggestions for flexible, space-saving furniture?