The only one method that can bring happiness

Work very hard.

If i were to pass you only one knowledge, this would be it.

All other methods are superficial and would not work without the above method. The method is the mother of all methods. If you cannot control your physical world, all the rest 590 methods would not work to bring you happiness.

All experts once are lousy and dont know also, the only thing they to become is expert is

practice, practice, practice - A great samurai

As reported in the book "Outliners" all experts need 10,000 hours work to reach where they are. No matter if it is karate, chess, oracle, yoga, cooking, poker, sells, or even xbox, need constant practice.

A sellsman once ask a guru is there any special technique to make sells. The guru ask the sellsman to make cold calls 100 times a day.

Grunt force is always the way to go, from my long experience of searching for special short cut techniques for anything: chess, poker, enlightenment, reality manifesting, oracle etc, short cuts most of the time dont work but grunt work always work, it is like the law of gravity.

In karate, a good gyaku need a standard of 1,000 repetitions a day to reach competence.