An eco-friendly lifestyle includes a bit of strategy, so when it comes to your lawn, a little foresight never hurts. Yes, you want eco-friendly greenery, so get to it. Collect rainwater: it's easy. Just place a barrel under the gutter's downspout and let nature do the rest. Some barrels come with a spigot for watering. When spring rolls around, you'll have a hearty supply of free, fresh water.