A bit late for Obs Cop but three comments for anyone else approaching a rating test:
1) When I did my IMC rating the examiner had me take off 'under the hood', which I'd not tried in training. He was responsible for checking that the runway was clear, as obviously I couldn't see a thing. It was fine in the end, but I wish I'd tried it before the test itself.
2) Same examiner, during the unusual attitude recovery put the plane in a steep climb with corresponding decreasing airspeed but had also trimmed it a long way back. It seems obvious now but for a split second I couldn't work out why all instruments were reading straight and level but it was a LOT of elbow power to keep it that way. Part of the problem was, I think, that I'd never flown a plane so far out of trim before - it didn't occur to me that that was what was happening.
3) During my IR the unusual attitude was a lot less unusual - quite a mild spiral dive but the difference was that it was a bit like Keef's - self-induced. However, instead of shutting my eyes he had me read detailed information off my airways chart without looking up.