Don't do what I did and say 'Look at that nice old airfield there - that must be Sleap' when actually it was Rednal, about 10 miles away... nearly cost me my pass, that... As he said afterwards, I should have kept my bl**dy mouth shut...
Similar consolation stories to the others, though: I nearly busted the Liverpool CTR (had to orbit while I sorted out the clearance) and my circuits were terrible (but I blamed a late decision to go around on the examiner - I had suggested a go-around at about 500ft (aircraft on the runway) and he had told me to continue, so when I went around at no more than 50ft he couldn't really complain...).
Good luck! I've got my IMC test today so I feel for you...
Tim