Hm..
Some spike bracelets. Maybe one skull ring? Maybe some colored hair spray, maybe. Leather boots do sound good. Hot Topic has Demona boots I think. Buy a tight, like Underarmour or whatever, shirt and rip it a little.
Do you have an idea of what I mean when I say those really cool metal finger thingies? I dunno what they're called, but they'd compliment a gothic outfit if you did it right.
That's all I know. Have fun at the thingy!
