The art of stalking is learning all the quirks of your disguise. To learn them so well no one will know you are disguised. For that you need to be ruthless, cunning, patient, and sweet.
Stalking is an art applicable to everything. There are four steps to learning it: ruthlessness, cunning, patience, and sweetness. Ruthlessness should not be harshness, cunning should not be cruelty, patience should not be negligence, and sweetness should not be foolishness. These four steps have to be practiced and perfected until they are so smooth they are unnoticeable.
Knowing what intent is means that one can, at any time, explain that knowledge or use it. A nagual by the force of his position is obliged to command his knowledge in this manner.