micmak and rinkins have a really good point. I failed first time on not looking in the mirror enough. My driving instructor said he knew I used the mirror a lot but because I only moved my eyes, the examiner couldn't see my head actually moving to look.
don't listen to Butch either, scoring points on driving is just ..not on ;-)
When you learn there seems to be an awful lot to do at the same time, so don't flap. Remember if you stall, it doesn't matter - the examiner is more concerned to know that you know what to do IF you stall, not that you've done it.
Mirror - signal -maneouvre.. good luck to you with it!