I usually try not to ask for gift cards on this list (although I do reserve it as a great option when asked what I want and I don't have a list ready..), but today's ideas are a bunch of little things - makeup and hair stuff, specifically - that can all be purchased from Sephora. So I'll go with a gift card from Sephora.
But in the spirit of this list, here are some things I'd probably get if such a gift card fell into my hands:
MakeUp Forever Aqua Eyes eyeliner (in several colors, including the 5L, 6L and 14L, otherwise known as deep olive green, purple black, and pearl white sheen),
a hair glossing/shine serum (since it's not my normal salon, I'm open to suggestions here), and maybe even the
Sephora by OPI gelshine At-Home Gel Colour System to do my own fancy nails.
Or maybe not, since I'd be afraid of screwing them up.
But definitely the eyeliner. And probably something for my hair ;)