Intercessory prayer is a key part of the liturgy of the Eucharist. Intercessory prayers need to reflect a response to the preached Word and topical concern for the world and need to be prepared afresh for each service. Intercessory prayer is also known as 'the prayer of the people' and is often said by a member of the congregation, not a priest.
For anyone with this ministry in their local church, here is a complete companion handbook that includes:
a simple theology of intercessory prayer
an explanation of its purpose within the liturgy
its relation to the readings of the day
the difference between public and personal prayer
a guide to writing intercessory prayers that connect with the whole service
technical advice: use of language, addressing God, vocal expression
common errors to avoid: excessive length or detail, breaches of confidence
prayerful preparation, using other resources, developing a personal style
ready to use intercessory prayers.