Train heavy, 4-8 reps, never doing more 8 on compounds.
5x5, and 6x6 rep schemes boost T.
Not doing high-volume which lowers T. Moderate volume is best 6-8 sets per body part for generally 6-8 reps. A little higher on select isolation movements like lateral raises, rear cable laterals, and so on...
Train hard only 3 times a week.
Tribulus- T-500
Long Jack- Eurycoma 1500 (Personal fav)
Masturbate and or fuck regularly. Get that nut!
Don't go low-carb, ever. Unless it's for a meal or two later in the day.
Don't get married and or have kids, that lowers test levels. (Fact)