Sleep 7–9 hours nightly
Lift weights regularly
Do compound exercises
Reduce body fat if overweight
Eat enough calories
Eat enough protein
Include healthy fats
Get enough zinc
Get enough vitamin D
Manage stress
Limit alcohol
Avoid smoking
Avoid anabolic steroids
Treat sleep apnea
Address low testosterone with a doctor
Review medications that may lower testosterone
Maintain regular sexual activity
Avoid overtraining
Get sunlight exposure
Stay physically active daily
Control blood sugar
Improve overall health markers