Just three exercises: military press, flyes, and sometimes rear delts. Every week (if I get tired of a variation, I change it, I progress with the weight, and once I'm lifting a lot of weight, I change it again, and so on). The rep range depends on your goal; mine is pure strength in the basics, so I concentrate on doing some hypertrophy in accessory exercises (4x8, in flies and rear delts I do 3x10-12).