Praying for those things that are within the will of God for us; do we really know how to do that? Seeking out the will of God, as He has determined it to be, takes much prayer in which we ask no other question but “what is your will for me?”, and listening for His reply, then when God answers and makes that desire known to us... we will know how to pray as we should. Until that time our prayers are best conducted by the Holy Spirit within us.