Building Barbarian in Inferno

Up until now I have been building my barbarian with primarily strength and secondary vitality. So far it has been going good but now when I am in inferno it seems it's not a viable strategy. I am really having a hard time with blue and yellow monster groups. Some friends have suggested that I build intellect or resistance as well. How should I build my barbarian to better tackle the elite groups. Maybe there are some skills or passives that are a lot better for elites.