Wow, what wouldn't I tell my senior self? I would say work harder and play less. Grades do matter and be honest with your teachers. Don't skip class, you never know what you may have learned that day. Ask questions. You get out of your education what you put into it, and in the long run the hard work will be worth it. I would also tell myself to only take out loans if absolutely necessary, and never take the overage for more then books. You will have to pay those loans back some day. College is not a walk in the park, but it will give your self-esteem the biggest boost you could ever imagine.