Chant the Mul Mantra, inhaling completely before each phrase:
EK ONG KAR;
SAT NAAM;
KARTA POORKH (let the whole breath go through the nose);
NIR BHAO;
NIR VAIR;
AKAAL MOORT;
AJOONEE;
SAIBHUNG;
GUR PARSAAD;
JAP (let the whole breath go through the nose);
AAD SACHSHHH (release breath with a hiss);
JUGAAD SACHSHHH (release breath with a hiss);
HAI BHEE SACHSHHH (release breath with a hiss);
NANAK HOSEE BHEE SACHSHHH (release breath with a hiss).
Each time you inhale you must do so to your maximum capacity and each phrase must use up the entire breath. On words like AKAAL MOORT, where the sound isn't really extended, release the breath through the mouth with a light “uhh...” sound. On KARTA POORKH and JAP, release the breath through the nose. This is the whole secret: the last 4 phrases are ended with the breath released through the mouth like the sound of a hissing snake.
Chant for a minimum of 11 times a day for 40 days. Since each person has a different lung capacity, this meditation should be done individually instead of in a group.