Buy a reusable water bottle.

Reusable water bottles are more accessible and more cost-efficient than plastic water bottles. Once you buy a reusable water bottle, you don't have a need to keep purchasing plastic water bottles.

Purchase reusable shopping bags.

Reusable shopping bags are more durable than plastic bags, and they hold more. What takes two or three trips with regular plastic bags will only take one with a reusable bag.

Purchase Reusable Straws.

It took a little getting used to when I first started using reusable straws, but I now keep my straw pouch in my book bag, and I carry it with me all over campus. I also feel a little bit better knowing that I'm saving a turtle.

Take the bus or carpool with a friend.

Taking the bus is something that I do whenever I am heading to campus. However, when I'm heading home, I will hitch a ride with my friend on the way back to my apartment, or I will take the bus.

Decrease your meat consumption.

Now, I'm not saying that you should give up meat completely, but try going meatless once a week. Who knows, you might even enjoy it!