NOTE: Many of today recipes require you loosen the skin on the turkey. Here is a bit of information on how to loosen the skin without damaging the skin.
Poke the end of a small spoon between the breast meat and skin, starting at the open cavity of the turkey. Move the spoon over the breast to separate the skin from the meat; take care not to rip the skin.
Do this on both sides of the breastbone. Place a spoonful of the herbs, butter, spices, etc. under the skin, and press it out to distribute it evenly over the breast.