Having a Difficulty at Writing

This is kinda make me down. Knowing that I'm bad at academic writing, besides I'm an english literature student. I must face essays and papers everyweek, but I have difficulty at those thingy. How can I increase my skill at writing? :( Now, I'm in the middle of writing an essay about U.S. Basic Rights, and I still don't know what my thesis gonna be. Aaaaarrrgghh!!! #frustated