Fishnets, Fishnets, Fishnets!
On your arms, on your legs, a tube around your neck as a choker... heck, even try a piece of fishnet stocking as a veil attached to a little black hat, for that "Lolita" mystique. Or pin a piece to your hair, along with a plastic flower (black, red, or purple) as a fascinator.
Cleopatra-esque winged eyeliner. Cheap bright red rouge can be a great Goth eyeshadow, blended with a little bit of Vaseline for staying power.
If you can find it, white eyeliner looks incredibly spooky lining your lower lids and the crease, down to your nose. It makes for an ethereal cat-eye look. If you have anything with an ankh on it, that'll help lots.
If not, anything stars or moons for jewelry.
Black nails. VERY important to have black nails. Sharpie works in a pinch if you don't have polish.
And, of course, the best accessory is a permanent puckered scowl!
Call yourself Morgana Ravenmoth for added flair.
(I used to be a Dark Wave kid... I think I still have my black velvet hooded walking cloak packed away somewhere, shame I can't lend it to you for the night.

)
Yeah, I hear ya. If anyone needs some tips on how to be a smelly hippie, I've got some suggestions.
That made me laugh longer and harder than it should've. The people at work are looking at me funny now...
"That's nag champa incense you smell, dude!"