Pray to God always and tell Him what it is that you want Him to do for you. The Bible tells us that we should come to the throne of grace with confidence. We should have the confidence that God will answer us when we call Him.
The relationship between us and our Father should be clear. We should love God with our whole heart. We should keep his commandments. We should live our lives and please Him every day. There shouldn't be any sin in us because if there any sin God will not answer us.
Our prayers should be out of faith; we should trust God and be confident that God is willing to answer us. Faith is the engine room of our prayers. If we have no faith our prayers won't be answered. When we pray, we should pray by faith without any doubt in our hearts.
The prayers of faith which a righteous man offers is very powerful.