When training biceps, concentration and form are key elements.
Ignore any good looking guys in the gym.
Remember this tip from Rob Wilkins:
"The biceps are a small muscle group that comprises only 30% of your upper arm while the triceps comprise 70%. Since the biceps are so small they are very easy to overtrain and should not be worked more than twice per week. Also, in order to increase your arm size an inch, you will have to consider gaining between 10-15 pounds in your overall body weight. "