Socialist lesbian metalhead, eighteen, very pleased to meet you. Message me here or follow me on Tumblr at gay-d-h-d.
The Review Game: Great source for critique for writers of all skill levels. I live there.
NaNoWriMo: Yearly challenge to write a novel in a month. I've failed for the past two years. Friend me there at TinfoilKnight.
Limyaael's Fantasy Rants: Over 400 soul-crushing essays written by a very disgruntled writer and English major. Topics span from general advice about avoiding cliches to descriptive prose to writing elves and werewolves and spunky female protagonists. Worth reading, even if you don't write fantasy. I read these when I was twelve and haven't been the same since.
On Writing by Stephen King: Half memoir, half writing advice, all worth reading,
Self-Editing for Fiction Writers: If you like grammar and style, you'll love this book. If you don't like grammar and style, you should read it anyway.
How Not to Write A Novel: Funny. Read it.