I like ASOS. It's a good site to find unique, sometimes pricey, sometimes cheap stuff. Here are some accessories I liked.
Multi Strand Zip Cuff Bracelet with Leather Fastening
Cuffs + Zippers, a pretty happy marriage methinks
ASOS Overknee Socks
These can be useful but you have to be careful to not come off as trashy
ASOS Punchout Iridescent Duffle Bag
Seems like a little pouch, eh? Not exactly. It's actually fairly big. But you can worck it.
ASOS Pastel Lens Geeky Sunglasses
Geeks rule! It was real nice how on Nerd day back in high school, some people just showed up looking how they do everyday. Because geeks are in fashion lately, haha. But geeks truly are awesome, don't let anyone tell you different.
ASOS Mini Skull and Spike Stud Earrings
Sigh, I want a second piercing. And third. Maybe.
ASOS Swooping Arrow Stud Earrings
And you can turn them in all different directions to suit your mood. You can turn them towards your friend when you wear your favorite "I'm With Stupid" tee. Those are sort of lame, though.