Testosterone is essential to male happiness. High T correlates with better concentration, more risk taking behavior, more muscle growth and better sleep.

These links contain everything important about T

http://www.artofmanliness.com/2013/01/18/how-to-increase-testosterone-naturally/

The unsexy truth is that increasing testosterone naturally simply comes down to making some long-term changes in your diet and lifestyle. As you’ll see, what I did to increase T largely boils down to eating better, exercising smarter, and getting more sleep. That’s pretty much it. But as with most things in life, the devil is in the details, so I’ll share with you exactly what I did and provide research that explains why the things I did helped boost my testosterone.

The good news here is that while the things I recommend below will boost your T, their effect is hardly limited to testosterone. They’ll greatly increase your overall health and well-being at the same time.

Links stopped working, but you can get the free ebook when you join a mailing list

http://www.thematinggrounds.com/testosterone/

http://www.shape.com/fitness/workouts/8-benefits-high-intensity-interval-training-hiit

Testosterone shake: https://www.youtube.com/watch?v=XxxyzJ0DHOQ

And this little fungi increases your T levels immensely:

http://www.amazon.com/New-Chapter-LifeShield-Cordyceps-Capsules/dp/B0039L7KNC

Some people will say that a diet will only increase your T levels by 5%, if this is true, then do it anyways, 1% or 5%, more T equals more happiness.