First off, I should explain that "hacking" no longer necessarily carries a negative connotation. In fact, its original negative connotation was a kind of misunderstanding. "To hack" means to come up with a creative or clever solution. Thus, one of the more popular blogs today is Lifehacker ("features tips, shortcuts, and downloads that help you get things done smarter and more efficiently"). (Check out their entry on StudyRails, a webapp that works a bit like Outlook to track time for students and notify them of upcoming assignment deadlines.)
Another blog, especially for college students, is called HackCollege. Recent posts include settling debts between roommates, five great faux-homecooked-meals to make in the dorm microwave, and an essay pondering the future of textbooks on the Kindle.
Great stuff for the college student -- and high school seniors as they start preparing for the big transition.