change your workout routine everytime your in the gym. pyramid to heavy weights 7-10 reps. less resting time. intensity. no chit-chatting in the gym, do that when ur done training. 10 minutes warmup and 15-20 bike when done train. drink lots of water cool down. The end.
I agree with Philia...no need to change routine every time. Instead, vary the training split after about 3-4 weeks so your body's muscles continue to be "shocked." Train heavy, but also smart.