Sometimes I have heard reformed people discussing the means of grace as "Word and sacrament". Though I understand the need to emphasise that churches should be committed to the ordinary and outward means of grace, this short-hand label is somewhat truncated. Why do I say that? It is because Question 88 of the Westminster Shorter Catechism gives a more comprehensive explanation than "Word and sacrament".
Question 88. What are the outward and ordinary means whereby Christ communicates to us the benefits of redemption?
Answer. The outward and ordinary means whereby Christ communicates to us the benefits of redemption are, his ordinances, especially the Word, sacraments, and prayer; all which are made effectual to the elect for salvation.
Can you see what was missing? It is PRAYER which is also an outward and ordinary means whereby Christ communicates to us the benefits of redemption ... and it is made effectual for salvation. Therefore, the full and complete answer is the "Word, sacraments and prayer". And how important prayer is for the church and for individuals, not only for answered prayer but also for Christ to communicate to us. A large portion of the Westminster Standards is devoted to an exposition of the Lord's Prayer, with the intention that individual Christians, families and churches would avail themselves of this crucial means of grace.
Listen to Paul writing to the Colossian Church:
4:2: "Continue steadfastly in prayer, being watchful in it with thanksgiving."
Paul then requests prayer for himself and his apostolic team from the church. Paul needed the prayers of churches, there was inter-dependence.
4:3-4: "At the same time, pray also for us, that God may open to us a door for the word, to declare the mystery of Christ, on account of which I am in prison— that I may make it clear, which is how I ought to speak."
Paul then explains how Ephaphras was committed to prayer for their church. "Epaphras, who is one of you, a servant of Christ Jesus, greets you, always struggling on your behalf in his prayers, that you may stand mature and fully assured in all the will of God" 4:12.
May we all, not least myself, not only read about prayer, but become like Christ and actually pray regularly, faithfully, with purpose and engage our whole being in the secret place. May God help us in this by his grace. The best way to learn how to pray, is on your knees, in a secret place, with the Bible open before you.