I usually mix it up each day especially when it comes to my biceps and triceps; I'll sometimes do Preacher Curls, Hammer Curls, Standing Barbell Curls, Dumbbell Curls, Chinups for my biceps and for my triceps I'll do Rope Pull downs, Straight bar pull downs, Tricep Extensions, and dips. For my chest I usually do 4 sets of 10 for DB Bench and sometimes I do Incline and Close grip Bench. For my shoulders, on Mondays I do Shoulder Press with Dumbbells and on Thursdays I do Shoulder Press with Barbell. For my legs I do Squats or Leg Press, Lunges, and Calf Raises. For my back I usually just do Barbell Rows and then Deadlifts. For my abs all I do is leg raises on the machine that you hold yourself up on and decline weighted situps. If anyone has any other input besides about over working like anything I can change and any exercises I can add or anything at all, feel free to post it.