Write with abandon and no constraints for first draft. Cut brutally and save in separate files on second draft. Add conflict; don't be afraid to make your characters suffer. Read what you love. Write what you love. Love.
I love Sylvia Plath and Anne Sexton. I also love more cerebral poets like H.D. and Emily Dickinson. My parents subscribed to a monthly poetry periodical, and as a teenager I was introduced to Denise Levertov, who was an influence.