Congratulations! Dealing with the stress-eating is definitely a long-term goal made up of the tiny, tiny steps taken every day to resist one's desire to indulge poor eating choices.
Since stress is an issue, take steps to deal with that directly in some other way - exercise, meditation, whatever you think would be useful to you.
Did you exercise during your weight loss? If you did, you could set an achievement-related goal related to running or walking or whatever form of exercise you do. If you are not exercising already, you could make your next goal to develop an exercise habit.
My Sparkpage is set to private, but I'm open to SparkMail!
"People often say that motivation doesn't last. Well, neither does bathing--that's why we recommend it daily." - Zig Ziglar