We have to be still and allow our mind to clear as we focus upon God.
But we also need to remember that if we have not entered His presence and truly anytime we are newly entering His presence we must follow the way Jesus taught His disciples.
Begin with Reverence, Awe, Praise, Honor, acknowledging that we are coming before the Throne of the King of Kings and The Lord of Lords. We enter God's presence with praise, fear (awe/respect) and covered by the blood and name of Jesus through the power of the Holy Spirit. Prayer is done in spirit and truth, not flesh and deception.
Our Father Who Art In Heaven = Recognize God, Who is in Heaven, Address our attention to Him.
Hallowed Be They Name = Reverence Him, He is Holy, We are only Holy when covered by Jesus.
Thy Kingdom Come, Thy will be done, on earth as it is in heaven = God is Sovereign both in earth and heaven, we are not. We must pray with a humble spirit, a bowing spirit.
Give us this day our daily bread = we need prayer daily, just as we need food daily, but God does recognize our physical needs, though providing for us spiritually is essential.
And forgive us our trespasses = we must repent to enter God's presence, we must confess any known sin but also be totally open for God to point out sin in our life prepared to repent when it is brought to our attention. Also we must forgive ourselves, for if we do not we are being our own god. If God forgives us, who are we to not!
As we forgive those who have trespasses against us = To enter God's presence we must be willing to forgive every other person, we must deal with forgiveness and in obedience lay down before God any hurt, injury or debt we feel another person owes us. If we have been injured and feel another person must pay for what they have done, that they are going to get what is coming, we have not fully given that person over to God and released them by fully and continually forgiving them. Forgiveness is not a one time event; we must newly forgive each time it is needed.
With praise, a humble posture, an asking of petition/need, a forgiving heart and seeking His protection, we can grow in quiet time with God.
Now what is your purpose for prayer? To be loved by God. Be still and let Him love you. Let Him fill you. Let Him be anchored to your inner core being. Be saturated in His love for you.
God is all we need. We need prayer time - time alone with God - being loved by Him.