*exclamer* Subjective information..
Boosting your testosterone naturally is not going to have nearly as much effect at gaining muscle as just getting the right amout of protein/fat/carbs, but anyways...
)
6. Do excercises that involve lots of muscles. Squat, deadlift, bench, bentover row etc..
9. Don't overtrain.
10. Get your rest.
11. Don't take steriods.
Just use common sense and don't go overboard on any of these things.