Love is the principle of action, not a quality of behavior. We cannot learn unconditional love. To love unconditionally, we must become Love. And love is the natural outcome of union with the Inner Self or Soul.
At any given time we are likely to have not a single practice but rather a constellation of practices, often with one of them as our primary practice. Others may surround it, each carrying its own special place in our life... As the months and years go by the constellation changes. New practices emerge. Practices that have been present for years fall out of the picture.