The main way I am doing it is creating a mindset of looking forward to my “night school” sessions as I sleep/dream. I take advantage of a naturally “thin veil” situation. It seems to be a specific form of lucid dreaming in which I try to encounter a character or characters representing my spirit in each dream.
Have you looked into the Imaginal Realm in the spiritual literature ... Cynthia Bourgeault?
The Mundus Imaginalis by Henry Corbin?
You mention prayer. If God individualizes His nature to work with the uniqueness of an individual, would not God Himself be at that moment akin to that person’s individual spirit?
I would say God is, inevitably, the mystery of mysteries. I would caution the idea of God 'individualising His nature' because that leads many to assume they are, in some way, God, and also that there are qualitative and quantitative distinctions in the divine – an introduction of category – when the Divine Nature is One, Simple, and so on ...
... however, when one says "I", two things happen. One is that "I" stands in relation to others. I think, as developing people, we are conscious of others before we are conscious of ourselves. But in reality there is only one subsistent "I", and that is God, and that, mysteriously, God allows His creature to participate in that sense of "I".
The Fall, then, is when that "I" sought its independence and equality with that prior, singular and eternal "I" from which it rose, and in so doing sundered that primordiality, that recognition, that
contiguity, between "I" and "Thou".
So, prayer, even if to Spirit/God seems to be a way to get to know “one’s spirit.”
Inasmuch as one's spirit exists as an interface, a veil, which is translucent, and reveals as much as conceals.
But all this is, on my part, somewhat speculative.