Reducing is probably the hugest category and the biggest way to make an impact. While recycling and reusing are wonderful, the act of reducing eliminates a substantial amount more waste. Why you ask? Simple answer, if you reduce the waste to begin with, you will not have to worry about the other two Rs!
First thing to remember about reducing is that production of goods increases waste. Do not be afraid to hit up local thrift stores to buy some items that you might need for a dorm. Try and buy green items from the beginning. There are plenty of stores that sell organic and recycled goods that have been made in a green manner. Think about what you need and buy only what you need. There is no good reason to buy unnecessary items just to have them. Try and just stick to the basics instead of going overboard. If you are someone who likes to have a drink all the time, buy a reusable bottle. Many college bookstores sell reusable drink-ware with the college logo, so they are a good way to support your college while going green.
Many college students have no choice but to do some grocery shopping. You need to have snacks for those all nighters, especially if your campus does not have 24-hour access to food. When you head over to the grocery store, you can continue being green by taking a canvas grocery bag. If you do not already own one, many grocery stores sell their own with a store logo or cutesy design on them for a small fee. Try your best to buy local. Locally grown items are not shipped very far, so they greatly cut down on fuel waste. They might be slightly more expensive, but in the long run they are both supporting the cause and they are supporting local farmers.
While there are many other ways to go green on a college campus, these are some of the biggest ways you can help.