The one known as St. Francis of Assisi did pray to be an instrument of the Lord. What does this mean? An instrument is a tool—an implement used to affect and change something for a desired result. If God were to use you, what result would God desire? You know the answer, as did St. Francis: to bring more peace and love to your world.
How can you be such an instrument? It is quite simple. Allow God’s love to flow in you and through you. Do no dam it up with thoughts that are less than loving and peaceful. Judge not others. Merely be that perfect instrument through which love flows unimpeded, reaching out to others so that they may experience love in its most pure form.
You do not need to be a saint to do this, for all spirit-beings have this capacity. Be the instrument of God which you are in every moment and let the love flow.