I write the POF in our parish. I have always been taught to make it simple. God knows our needs so we don't need to write these long drawn out petitions. I always start with "For...." and I never or rarely add a "that..."
For example from this past Sunday. "For the Church: for our pope, bishops and clergy who like the Good Shepherd lead us ever closer to salvation.
For an increase in vocations: for more young people to answer God's call to serve Him is ordained ministry, and religious life, and for all those discerning a vocation.
For government officials, for all who enact laws and especially for laws that protect and respect all human life.
For all of us here present, for a greater openness to hearing the voice of the Good Shepherd, and for an increase in our love and devotion to Christ.
For all our second graders who received Jesus for the first time in Holy Communion. for their families and catechists, and for a greater awareness of the great gift of the Eucharist.
I usually have 6-8 petitions, always adding one for "the poor, the unemployed, etc." and for the sick and the deceased where I name those who have been reported sick or deceased during the week. We also add the name of the person or persons the Mass is offered for.