Some people go for a more romantic take on decorating. Lace and trinkets.
unicorns and mirrors
Others a more tradtional look...black. All black.
Never the less, don't do what everyone else is doing because it's "the right way". Because all those people you're refereing to don't have to live in there.

Okay, with that in mind, here are some sites so set you on your merry make-over way... For help for the all-mighty alt.goths, go here and here.
And then there is my all time favorite, Gothic Matha Stewart.

As for my interior decorating, I went for a collage motif. The wall are covered top to bottom of verious pictures from various sources.
Fetish bunnies, Tori Amos, and alot of hot girls are on my walls. As for the furniture, I have a brass cage with various little things displayed. My butterfly ashtray, statue of cherubs and dried roses to name a few.
Nothing magnificent, but I like it. ;-0 Smooches!