That is a really good one, good sense of responsibility for yourself and someone else, as well. But don't worry too much. I though if I didn't revise well enough last year, things would go bits up by not getting into uni etc. Well, I got in, but nothing could have prepared me for this year (in a non-academical sense) and I'm at another crossroads. What I'm trying to say is, it's not the be all and end all. Relax a bit, don't take it so serious all the time, but when you do, go at it 100%.