There are two generic types of spiritual practice (sādhanā)
Going from many to one
Doing spiritual practice relevant to the times
There are as many paths to God as there are people
Just as in any field of expertise, we also need to listen to an authority in the field of Spirituality if we want to progress spiritually.
Rapid spiritual progress can be achieved when we do spiritual practice according to the basic principles of Spirituality.
In Spirituality, words have only 2% importance while 98% importance lies in getting the experience of those words.
Just as we increase our levels of fitness by steadily increasing our exercise regime, the same is true in spiritual practice.
If we are serious about any endeavour in life we need to be both persistent and regular.