Some good advice there. I went through university (in the UK) with only a medium amount of effort (I failed and had to do resit exams for 2 years) and scraped out a 2:1. But because I had spent time playing around in areas that interested me (aka security) finding a job afterwards was not difficult - I had character and a feel for the job, my mediocre degree wasnt really a factor.

A coursemate who spent a LOT of time working (and not socialising) got himself a top grade 1st and is still (a year later) struggling to find work.