Do your biceps work after a good back workout. Here's my total back/biceps routine. Works wonders for me.
After warming up...
Pull-ups x 4-5 sets to positive failure, FULL RANGE OF MOTION (sometimes with weights)
Bent-over Underhanded Barbell Rows x 4 sets of 10-12, 8-10, 6-8, 4-6.. Pull the barbell straight up into your gut the same way you'd normally do rows.
Occasionally I do deadlifts. After warming up, I may do 3 x 8, 5, 3
For biceps... Do 1 set of warm ups
Barbell or Curl Bar Curls 1 set x 8-10 (slow negatives)
Incline DB Curls 1 set x 6-10.. Start with palms facing each other and as you curl the weight, rotate your wrist so that at the peak of the movement your pinky finger is trying to go higher than your thumb... Squeeze here, lower under control, repeat.
Lying Curls 1 set x 6-10.. Just lay flat on a bench with your head up, you get a really good stretch. Search images for this exercise if you need to.
Preacher Curls with bar or dumbbells 1 set x 8-10.. Full range of motion
So I'm doing four working sets for biceps, which is about the right number for me. I may start doing one less set actually. I swap up the exercises I do. The whole point is to do multiple exercises. I usually always include at least bar curls (for maximum poundage) or incline curls (great range of motion). Other good exercises to substitute are standing DB curls and chin-ups. Or instead of this I may do 2 sets of reverse bar curls, then 2 biceps-specific exercises.
Flex hard for 1 minute after you're done, then stretch them out really well.
The underhand bent rows have been doing a lot for me lately. Give those a try!