Put chicken breasts in the crock pot (you can even put them in frozen)
dump the beans and corn on top of the chicken
mix the cream of chicken soup, taco seasoning, green chilis and chicken broth; dump this on top of the chicken, beans and corn
cover and cook on low for 8 to 10 hours
take the chicken breasts out, cut into cubes, return to chili and stir
top with cheese and sour cream if desired