never be a slave to a written routine.....your body will tell you, every workout, what the routine should be.....if you are simply NOT connecting to a certain exercise on a given night, then by all means, don't beat a dead horse and move on, but conversely, don't leave it if you are grooving on it.....and don't worry about doing more sets than you were supposed to at the end, because, as I said, if we are "TRAINING" we are looking to increase some sort of capacity somewhere along the line at all times.....