from Tom Sines site on remixed Monastic orders

Seed Sight: TOM
A Rule of Life is a list of practices we intentionally undertake to maintain and deepen our relationship with God.  It encourages us to set goals for our spiritual growth and to create a pattern for our lives that opens us to God's presence.  Different Rules have been a part of monastic life since the early days of the church. 

One example Rule of Life is from The Order of Mission (TOM), based out of St Thomas Church, Sheffield, England.  The Order of Mission is a global missionary Order, jointly established by the Church of England and Baptist Union UK. 

The traditional monastic concepts of poverty, chastity and obedience are reinterpreted in the Rule of TOM as devotion to a life of simplicity, purity and accountability. The Rule also requires a balanced Christian lifestyle known as UP, IN and OUT whereby members undertake to live a common life (INwards to each other), sustained by a discipline of common worship and prayer (UPwards to God), and issuing in works that are primarily of a public nature (OUTwards to the world).  You can read more about The Order of Mission and their rule of life here.

Seed Sprout: order of mustard seed
Another Rule of Life comes from The Order of the Mustard Seed.  The Order of the Mustard Seed was a society founded in the 18th century by Count Zinzendorf.  Members of 24-7 Prayer are catalyzing and nurturing this contemporary Order of the Mustard Seed.  The members of this order vow three things:
To be true to Christ;
To be kind to people;
To take the gospel to the nations.

In The Vision and the Vow, Pete Greig, of 24-7 Prayer, explores this ancient Rule of Life and calls us to consider entering into a similar covenant with God and friends to pursue these three dimensions of discipleship for the rest of our lives.
"Just imagine," says Pete, "what might happen if cells of the Order of the Mustard Seed were planted in thousands of churches and in every Christian tradition bringing faith and renewal. We could start a contagion of kindness and grace, modeling authentic, balanced, and Christ-centered lifestyles of discipleship. We could catalyze a fresh movement of mission and justice in every sphere of society where Christ is not known.  The vow can be marked outwardly by a ring and perhaps a tattoo as well, if your conscience permits.
You can read more about The Order of the Mustard Seed and their rule of life here.