The following four points for Christian Unity (known as the Chicago-Lambeth Quadrilateral) is a good summary of what Episcopalians and Anglicans hold essential:
Our Liturgies, Sacraments, and Catechism are ordered by and can be found in the Book of Common Prayer, 1979. The Constitution and Canons of the Episcopal Church are are governing documents.
The Holy Eucharist, the principal act of Christian worship on the Lord's Day and other major Feasts, and Daily Morning and Evening Prayer, as set forth in the Book of Common Prayer, 1979, are the regular services offered at Christ Church. The liturgies for the Sacraments and other Sacraental Rites (Baptism, Holy Eucharist, Confirmation, Ordination, Marriage, Penance, Holy Unction & Burial) can also be found in the Book of Common Prayer, and are offered at Chirst Church.