#4 Recycle

Seriously, recycling doesn't cost you anything (unless you have to transport your recyclables to a drop-off facility) and it can actually save you money. We recycle or reuse as much as possible (even if our pickup doesn't pick up all plastic numbers) and we have our trash cut in half. With half the trash we only need a trash bin half the size and our trash bill ends up being a little more than half the cost than what it once was. And not to mention that you can usually get your recycling bins for free from your city hall.