Mind posting your build. I have a dual wielding barb, but I always seem to be running out of fury, and with its short duration its actually not that fun for me. Not sure what others are doing different, but other barbs I've played with seem to be able to keep it up longer.
Here is the build http://us.battle.net/d3/en/calculator/barbarian#hUPQik!bYZ!ZZcbYc
I think you need atleast 42% crit and that should make fury generation pretty easy. Its a little hard getting fury to start a fight but once you have half fury you just make sure you have as many mobs around you as possible. Takes some micro management keeping all your cd's up and also watching your fury level but once you figure it out its pretty crazy. I can pretty much run through field of slaughter pulling every single mob i can and mow through them like nobodys business. Nothing like being in a group of 4 and the 3 other players just standing there watching you tank the whole map..rofl
