Kundalini Yoga is a practice of Hatha Yoga, developed by Yogi Bhajan. It is a blend of spiritual practices and physical practices. Kundalini Yoga incorporates movement, dynamic breathing techniques, meditation, and the chanting of mantras.
Yogis/Yoginis, individuals who are on the path of self discovery, are recommended to have a daily practice, called Sadhana. This recommendation - Niyama - is outlined in the Eight limbs of Yoga (blog post on this Niyama will follow shortly, see blog posts on the subject until now).
In the Kundalini Yoga tradition this means the practice of a particular kriya (series of postures) or mantra every single day for the same amount of time. Based on the number of days you do this, here is how it will affect your habits:
40 Days: Practice every day for 40 days straight. This will break any negative habits that block you from the expansion possible through the kriya or mantra.
90 Days: Practice every day for 90 days straight. This will establish a new habit in your conscious and subconscious minds based on the effect of the kriya or mantra. It will change you in a very deep way.
120 Days: Practice every day for 120 days straight. This will confirm the new habit of consciousness created by the kriya or mantra. The positive benefits of the kriya get integrated permanently into your psyche.
1000 Days: Practice every day for 1000 days straight. This will allow you to master the new habit of consciousness that the kriya or mantra has promised. No matter what the challenge, you can call on this new habit to serve you.
The connect all Yogis/Yoginis around the world, there are Global Sadhanas (daily practices), when millions of people from around the world practise in the same timeline, creating an even stronger energy field.