I imagine this question will vary depending upon how advanced you are. As a newbie I haven't felt a need to change my routine other than cardio. Cardio is a problem on cycle because of the pumps.
I think it depends on the muscle group. For myself (I'm intermediate), I do 9-12 sets for large groups (chest, back, glutes/quads) and ca. 6-9 sets for smaller groups (shoulders, biceps, triceps, etc.).
That's a good quote but I tend to believe that this is a thinking-man's game. Those who train smarter will get there faster than those who blindly train harder.
As stated, lower intensity and reps post cycle. However, attempt to increase poundage. This should be cycled periodically with high rep, light weight, high intensity workouts. I perfer a period of 2 weeks of the former plan followed by one week of the latter.