In reply to KeithW:
Thanks for the replies, serious or otherwise (no, really).
Sticking my hands in my belayer's pants is my favourite; solely because I suspect the ensuing row would take my mind off anything (and provide some frenetic exercise to boot.)
I was being a bit tongue in cheek, having been caught out the other day. I thought I had it sorted, with the neoprene wrist-warmers that I will happily bore anyone about at any opportunity; and always having spare gloves. Also 'windmilling' works well for me, and avoiding caffeine on the hill. But it goes to show, a moment of inattention can lead to minutes of gasping agony.
By the way, does anyone else find seconding ice routes harder work than leading? It always takes me longer to get screws out than to place them, and I arrive at the belay festooned with screws & draws dangling off random bits of my harness, slings & rucksack. Not an impressive sight.