Put chicken in slow-cooker.
In a bowl, combine barbecue sauce, dressing, brown sugar and Worcestershire sauce. Pour over chicken.
Cover and cook on low for 5 hours.
After 5 hours, remove chicken to a cutting board and shred with 2 forks.
In a small bowl, mix cornstarch and chicken broth. Stir into sauce in slow cooker, cover and cook until sauce is thickened and heated through, 5 to 10 minutes.
Return shredded chicken to slow-cooker, stir, cover and continue cooking on low for 45 minutes.
Serve chicken on whole-grain buns, with a vegetable and mac 'n cheese, or with baked potatoes, just to name a few ideas.