I found this prayer at DeoOmnisGloria that is perfect for the family (or small group or school):
Our forgiving Lord, we praise you for your unconvential love, compassion, and understanding.
It is through your sacrifice that we come together and praise you in song and prayer for all eternity.
Jesus, it is through our selfishness that we ignore others in need. Lord we are sorry for our sins and ask forgiveness.
Lord Jesus, please replace our sins of pride, anger and arrogance with love for others, compassion and serenity.
Remove our fear and doubts and help us do your will.
Good Shepherd, guide and protect us through the week.
We give you thanks, our Redeemer, for the gifts of friends, animals, food, family, and faith.
Father, with the Holy Spirit, watch over us and guide our actions.
Holy One, we adore you for all your love. Lamb of God give us strength to spread your peace.