'Om Namo Bhagavate Vasudevaya' is the incantation or ritual recitation devoted to Lord Krishna. This mantra is so powerful that it can provide you with the spritual guidance to attain the ultimate freedom from the eternal cycle of birth and death which occurs to all beings at all times to enlightenment. Whenever you chant this mantra, it clarifies that you bow to the Lord who resides within the heart of all beings. It also implies that you are humble and respectful enough to accept the spiritual guidances from Him.
Such spritual guidances can then come to you in various disciplines and forms as they are infinite and immeasurable. However, it depends upon whether you are able to acknowledge and recognise them or not.
Nonetheless, though those spiritual guidances are perpetual and can lead you to your enlightenment, you would be able to acquire them only as much as the capacity of your wisdom allows you. The capacity of your wisdom is like the capacity of a car engine. The more powerful, the faster you can reach your destination. To increase this capacity, you should realise the truth of the world that everything is impermanent and short-lived, resulting in suffering as everything is featureless and spiritless.