Self study.
Of the people I knew who did well, those who self studied alongside their normal course did things like website design, search algorithms, micro kernel design, robotics and advanced study in certain languages (lisp, c , C, Object Pascal, assembler), everyone I knew did the last thing, but the languages varied.
You can pass and get a 2.1 or 2.2 easily just by following the course guidelines. I got my phd offer not by doing this, but by cramming every day (almost every day, have a blowout night at the weekend, you've got to have some fun time) with additional study. I exceeded the requirements of every assignment (I wasn't alone in doing this), and studied around every topic taught. The result was a lot of very interesting phd offers when I graduated, it rocked. I was tired a lot, I will admit, but the benefit was vast, I was so far ahead of the students who just followed the course that I actually tutored some.
Don't assume I'm that clever though, I sweated blood sometimes trying to get assignments done early, and the extra learning was oft times very difficult. Every evening spent on it was one well spent however.
Most of the people I know personally who did this are now in great jobs, one heading towards millionaire status at 25. In his case he worked like a dog, even more than I did. You wouldn't beleive what he was capable of on graduation.
So work hard, and study around the subjects.
