I set the same goal last week: 10 lbs. by Halloween. I'm down 2 since then, so I think I stand a good chance of hitting it.
So far I've eliminated soda and eating after 9:00pm and rid my house of junk food (for snacks I bought a bunch of 100 calorie stuff). Between that and actually counting calories, I think I stand a good chance. Maybe some of the same things could work for you as well?
Best of luck!
My body is cage that keeps me from dancing with the one I love, but my mind holds the key...