Use the Lord’s Prayer for intercession by putting the name of the person you’re praying for in each clause.*
Our Father in heaven, may your name be kept holy in [name of person]. May your kingdom come in him. May your will be done in [person’s name] as it is in heaven. Give him today the food he needs, and forgive his sins. Help him to forgive those who sin against him. Don’t let [person’s name] yield to temptation, but rescue him from the evil one (adapted from Matthew 6:9-13).
*adapted from Charles Whiston, Teach Us To Pray, p.124-125.
A Blog on Prayer 
Here is a little more on intercession:
https://hitchhikeamerica.wordpress.com/2013/09/30/intercession/
Amen my book on prayer follows the Lord’s prayer as our example of how to pray. 🙂