Common Worship contains authorised services and prayers which are available for use in the Church of England, on which many of our church services are based on. Here is a selection of links to texts that might be particularly useful:

Planning Worship (help with putting services together)
Prayers for Various Occasions
Prayer during the Day
Morning and Evening Prayer
Night Prayer (Compline)
Confessions and Absolutions
Creeds and Affirmations

You can find the complete contents of the Common Worship book here.