thank god i don't have this problem this year.
How much are you thinking of spending???
I used to go down the old Tiffiney & Co route, women really seem to love this stuff but mind you it can be a bit pricey.
Last year I brought the x a bloody gucci watch which was really appreciated [mind you it should be because it cost 800 quid]
Failing that by her something practical like a new moblie phone then ring it on Christmas morning. That should be a nice surprise.
Or failing that you should get one of those Tortoise Licker vouchers [availble in all denominations for any sized wallet]