First, you must find a girl gang to roll with. This is the most important becasue if anyone tries to question how goth you are there will with 5 other goth girls to spit and rub vag blood all over the disbeliever.
Second you must all dress in black, preferably skanky black lingerie so everyone can see your Orgy tattoo and awesome sub-dermal piercings.
Third you need to be ironic and cover yourself in religious memorabilia becasue being goth is all about irony, it makes you seem mysterious
fourth spackle your face with as much black makeup as possible