According to Osho, samadhi is not achieved by effort but happens when you become utterly empty—a zero. Emptiness is the open space in which the Whole descends; fullness is the natural outcome. Your task is only to open the door by dropping ego, desires, and the language of gaining. When nothing of you occupies the inner house, consciousness floods in and samadhi flowers.
Empty your inside completely, and then true peace (samadhi) arrives on its own.