Common sense seems to state that for maximal muscle growth going to failure on every working set is a must. Although, common sense also states that this will lead to overtraining. Even on light days the goal of reaching failure is far to alluring to resist all be it with higher reps. Appart from using drugs how do you guys attempt to resolve this dichotomy? i.e. if you dont go to failure on some days how do work out if you have done enough?