Final answer:
Cialdini's six principles of influence should be used strategically, meaning appropriately and ethically in suitable situations.
Step-by-step explanation:
According to Cialdini's research on influencing people, the six principles should be used strategically. Robert Cialdini's six principles of influence include reciprocity, commitment, social proof, authority, liking, and scarcity. Each principle can be highly effective in persuading others when used appropriately. Using them strategically means employing them in situations where they fit naturally and ethically. Overuse or manipulation could lead to distrust and harm relationships rather than building them.