The three vows of religious life are: poverty, chastity, and obedience.
Poverty means that a religious does not own personal property. The religious owns all in common with the community, eats at a common table, contributes any salary or remuneration for work to a common fund, and lives in a simple manner befitting one living in evangelical poverty.
Chastity means that a religious lives with purity, both in body and mind, with respect to sexual activity and desire. This precludes not only marriage and sexual activity belonging to marriage, but also unchaste attitudes and activities which inflame venerial desires.
Obedience means that a religious respects and obeys the righteous authority of a religious superior as the inspired will of the Holy Spirit spoken through the religious superior. This doesn't mean that obedience is absolute or mindless, as that of a slave. Rather religious obedience is discerning, yet docile to the wisdom of the Spirit expressed in a well-ordered religious community.
These vows are ordered to an individual's journey toward Christian perfection, and as such, not only impose the obligation of living these "evangelical councils" faithfully, but also provide divine help and grace to live them out well.
These vows differ from the promises made at ordination by priests (both religious and secular). Ordination promises are primarily ordered to the good of the Church. In either case, it is a serious matter to break a vow or a promise.
Needless to say, all Christians benefit from observance of the virtues of poverty, chastity, and obedience, even if not formally vowed to them.
For more information click on the related links.
== Answer ==
The quick answer is "Poverty, Chastity and Obedience". Those are the vows taken by most members of religious orders. Particular orders (ic. Cistercians of Strict Observance) can include others, as well.
Poverty, chastity and obedience.