People who make decisions based merely on what seems most advisable to them will inevitably choose something inferior to God's best. Jesus, the ultimate model for the Christian life, did not rely on His own best thinking, but depended completely on His heavenly Father for wisdom in everything.
When God spoke to Moses and others in the Old Testament, those events were encounters with God. An encounter with Jesus was an encounter with God for the disciples. In the same way an encounter with the Holy Spirit is an encounter with God for you.
We've got to have a deep, intimate relationship with the Father if we're going to lead like Jesus.