Do a few sets of waterfall EZ-bar curls/skull crushers after a quick warm-up.
Waterfall curl layout:
Start with 20-25 pounds on each side, do ten reps with perfect form, take five pounds off each side, immediately continue to rep ten more out...continue until you're down to the bar.
Waterfall skull crusher:
Same thing, only maybe start with a heavier weight.
That will put hair on your chest! Also give you one heck of a pump.