I like to use IFBB pro Seth Feroce's protocol which is to start with low weight, high volume sets to rush blood into the muscles and fill them up. Then I kinda branch into my own thing and hit moderate weight for slow reps...really take time on the eccentric part of the curls. I move the weight up and follow the same principle. I use preacher curls on a preacher curl machine, standing dumbbell curls, seated incline curls
Basically my focus is to use good weight, really contract the biceps at the completion of the concentric movement, and really let the biceps feel the tension on the eccentric portion. I start and finish with low weight high rep movements to get blood pushed into the muscle.
Check out Seth feroce's arm workout video. Good stuff!!