How to build big biceps?

Building big biceps has become almost an 'obsessive addiction' in the gym as big biceps building are a must for everyone trying to build muscle mass. You have surely seen guys do bicep curls in between sets just so they can 'see' a little bit of a pump in their arms. You have perhaps come across guys spending an entire hour bent over doing concentration curls while starring in the mirror. There are even guys taking weights on vacation so that they can do some bicep curls at their hotel before they go into the club.