You should post your current routine so we can see what your working with. I personally train biceps and triceps on seperate days. I train each twice weekly, and on training days, I do 4 different exercises per body part. 3 sets per exercise. Arms are the only body part that I don't increase weight with each set. I pick a weight that I can barely do 12 times for the first set, then do as many as possible for each following set. On Wednesday, after my back workout, I do BB curls, seated alternating dumbbell curls, cambered bar preacher curls and standing cambered bar curls. On Saturdays, I do incline alternating DB curls, then superset preacher curls and BB curls. Then finish it off with standing cambered bar curls. My arms are my best body part.