The Spirit does not lead you to pray for useless goals.
Prayerlessness means unavailability to God.
All you need to do to learn to pray is to pray.
Prayer is your way, often the only way, to water the harvest. By prayer you can bring the Holy Spirit's blessing on any gospel effort anywhere in the world.
Prayer is the only adequate way to multiply our efforts fast enough to reap the harvest God desires.
The greatest privilege God gives to you is the freedom to approach Him at any time.