What's the quickest way to get bigger and stronger?
It's simple: Try to set a new personal records on every lift, every week. You should always strive to either complete more reps with the same weight or use more weight for the same number of reps every time you repeat a workout. You can try adding more sets, decreasing your rest periods between sets, supersetting, etc., but none of those approaches will give you results like this method will. You'll find that your workouts are more motivating as you shatter old records week after week.
It also prevents you from overtraining. You can't do too many sets when you're pushing yourself to the limit on each one.