0 – Obey the Lord and His Word in your daily Life (1 Sam 15:22).
W – Worship regularly with other believers in a local church (Heb 10:25; 13:15).
T – Tell others about your new faith in Christ (Matt 5:13-16).
H – Help serve God and His people in your church (Eph 4:16).
This is a very simple pattern for personal spiritual growth for both the new believer and someone who is older in the faith. Much more could be said about how to grow, but if they will do these things daily, they will be grounded in their salvation and alive in Christ.