The slow cooker is often my fall-back position for skinless chicken breasts, since other methods are more likely to dry out the meat if you leave it in too long. But there is a great alternative when you'd like to do it a bit faster (like half a day instead of all day!), and you don't want to have to worry about exact timing.
Braised Skinless Chicken Breasts
4 - 6 skinless chicken breast halves
Brine, 1/2 salt and 1/2 sugar
4 c chicken broth
1 c dry white wine
2 - 3 bay leaves
Fresh thyme sprigs
Onions, celery, carrots, and garlic, chopped in large pieces
1 oz dried porcini mushrooms
Brine the chicken pieces for a few hours. Remove and rinse. Place in a deep roasting pan or lasagna pan and add the broth, wine, herbs, and vegetables. Cover tightly with aluminum foil and place on a low oven shelf, cooking at 325 for about 2 1/2 to 3 hours.