I love to train my neck and have tried a great number of exercises. I found that a neck strap and heavy weight is great. Neck crunches are also good. These are done by hanging your head over the edge of the bench and taking a towel across your forehead. Place the plate on the towel and raise your head.
Traps are next.
And I love traps because there are so many exercises to do. Cleans, power pulls, snatch pulls, rack dead lifts, dumbbell swings, or any variation of these lifts. I love good old barbell squeeze your shoulder to your ears shrugs. I also believe in heavy, heavy, heavy trap work. Hips and butt are the areas that mosy shy away from.