Ask God for the grace to know what you must do and the strength to do it.
Often we may know what we must do, or what God wants us to do, but we are afraid to actually do it. We lack the courage and trust to be the person God created us to be.
In such situations, we need to ask God for the grace and strength to do what is right.
Here is a collect prayer from the Church that asks God for that strength, empowering us to both know and do God's will.