Jay Cutler stats on his website that he trains biceps on the same day as he trains his back. However, shapefit.com contradicts this split by stating, "The first thing you want to do is make sure you`re not training biceps on back day. Training your back first will fatigue your biceps." There is no rule stating that you must train biceps with any other muscle group. As with the training biceps with back example, there are just to many diffferent opinions to state that one way is the best. You need to find which split works best for you.
The biceps are not as an important muscle group as the triceps, but they should still not be neglected. There is no greater feeling than flexing your biceps and watching them peak into what a mountain looks like. You also need to take into account that the biceps are sometimes targeted on exercises you didn`t even think you would hit. It is very easy to overtrain them, especially if they are being worked more than twice a week. Until next time, don`t overtrain your biceps.