Played a little more Twilight Princess last night, and got to the start of the Temple of Time dungeon. Getting past the Twilit Ice Boss was a doddle really. Just a case of avoiding her attacks and then hitting her with the ball and chain a few times:
After collecting the mirror piece, I went off to Faron Woods to look for the next dungeon. Got stuck for 10 mins or so in the Sacred Grove trying to find the Scarecrow-guy with the Lantern, then realised he was up above me in the treetops, but apart from that I found the next dungeon pretty easily – where I saved and went to bed!