The next step in saving money is to be a bargain hunter with every aspect of your life. For starters, check sites like slickdeals.net and groupon.com regularly to find both deals around you and online. You may be asking why since both of these sites deal nothing with academics but saving while in college doesn't stop at academics. Both of these sites can offer deals which can save you hundreds of dollars in the long run.
For example, I found this deal on slickdeals about 6 months ago have have been using it whenever I buy anything on amazon. http://www.amazon.com/gp/student/signup/info. With a .edu email address, you can get a non-renewing 1 year sub to amazon prime for free. This means free 2 day shipping on anything amazon sells themselves and anything from their participating partners.