The Bible teaches that giving is a part of growing in our faith. It is a response to God's gifts to us and an act of worship toward Him.
Faithful giving is determined by a heart decision. Second Corinthians 9:7 says, "Every man according as he purposeth in his heart, so let him give, not grudgingly, or of necessity; for God loveth a cheerful giver."
That is the secret: making a decision in your heart to do God's will by giving to the Lord's work through your church.