Focus on a handful of big, basic lifts. Train very hard but within the context of intensity cycling. Get more rest days than training days.
Less training is more, and less is best.
Enough can't be iterated and reiterated about these key lessons, but for this article I'll focus on the fifth one though of course it brings in the others because they are so interrelated. All five of these key lessons can and are broken by some successful trainees. These exceptions are, however, almost entirely not the typical drug-free people I'm aiming my writing at. Should you be fortunate to have drug-free circumstances more suited to quicker gains than the typical person, make the most of it while it lasts. Follow the training methods promoted in HG and you will gain in abundance far more than you would on conventional programs.