Method. Upaya (Sanskrit: upāya, expedient means, pedagogy) is a term used in Mahayana Buddhism to refer to an aspect of guidance along the Buddhist Paths to liberation where a conscious, voluntary action is driven by an incomplete reasoning around its direction. Upaya is often used with kaushalya ("cleverness"), upaya-kaushalya meaning "skill in means".
Example video: Methods to Consciousness
Example via www.ramdass.org: Methods to Consciousness (Pt. 1-4)
Upaya-kaushalya is a concept emphasizing that practitioners may use their own specific methods or techniques that fit the situation in order to gain enlightenment. The implication is that even if a technique, view, etc., is not ultimately "true" in the highest sense, it may still be an expedient practice to perform or view to hold; i.e., it may bring the practitioner closer to the true realization in a similar way. The exercise of skill to which it refers, the ability to adapt one's message to the audience, is of enormous importance in the Pali Canon.
The Digital Dictionary of Buddhism notes that rendering the Chinese term fangbian into English as 'skillful' or as 'expedient' is often difficult, because the connotations shift according to the context as (1) the teaching being something to marvel at — the fact that the Buddha can present these difficult truths in everyday language (thus, skillful), yet that (2) they are teachings of a lower order as compared to the ultimate truth, and are far removed from reflecting reality, and are a kind of 'stopgap' measure (thus, expedient).