Take a couple of nice-smelling objects (fruits, vegetables) and smell them, trying not to associate the smell with the object.
Don Juan taught me that the limit of man's capability of perceiving is called the band of man, meaning that there is a boundary that marks human capabilities as dictated by the human organism. These boundaries are not merely the traditional boundaries of orderly thought, but the boundaries of the totality of resources locked within the human organism. Don Juan believed that these resources are never used, but are kept in situ by preconceived ideas about human limitations, limitations that have nothing to do with actual human potential.
Don Juan stated, as categorically as he was able to, that since perceiving energy as it flows in the universe is not arbitrary or idiosyncratic, seers witness formulations of energy that happen by themselves and are not molded by human interference. Thus, the perception of such formulations is, in itself and by itself, the key that releases the locked-in human potential that ordinarily has never entered into play. In order to elicit the perception of those energetic formulations, the totality of human capabilities to perceive has to be engaged.
C. Castaneda "Magical Passes"
Type: stopping the internal dialogue, not doing
Difficulty: low