Ephesians 6:18

Pray at all times (on every occasion, in every season) in the Spirit, with all [manner of] prayer and entreaty. To that end keep alert and watch with strong purpose and perseverance, interceding in behalf of all the saints (God’s consecrated people). Ephesians 6:18

Here is a great place to study what the Bible tells us about prayer.

None of us knows how to properly pray. So too the [Holy] Spirit comes to our aid and bears us up in our weakness; for we do not know what prayer to offer nor how to offer it worthily as we ought, but the Spirit Himself goes to meet our supplication and pleads in our behalf with unspeakable yearnings and groanings too deep for utterance. Romans 8:26 

We are to pray in private.But when you pray, go into your [most] private room, and, closing the door, pray to your Father, Who is in secret; and your Father, Who sees in secret, will reward you in the open. Matthew 6:6

We are to keep it simple. And when you pray, do not heap up phrases (multiply words, repeating the same ones over and over) as the Gentiles do, for they think they will be heard for their much speaking. Matthew 6:7

Our Father already knows what we need. Do not be like them, for your Father knows what you need before you ask Him. Matthew 6:8

Don’t pray for worldly things. Therefore do not worry and be anxious, saying, What are we going to have to eat? or, What are we going to have to drink? or, What are we going to have to wear? For the Gentiles (heathen) wish for and crave and diligently seek all these things, and your heavenly Father knows well that you need them all.  But seek (aim at and strive after) first of all His kingdom and His righteousness (His way of doing and being right), and then all these things taken together will be given you besides. 6:31-33

We are to keep at it. I tell you, although he will not get up and supply him anything because he is his friend, yet because of his shameless persistence and insistence he will get up and give him as much as he needs. So I say to you, Ask and keep on asking and it shall be given you; seek and keep on seeking and you shall find; knock and keep on knocking and the door shall be opened to you. For everyone who asks and keeps on asking receives; and he who seeks and keeps on seeking finds; and to him who knocks and keeps on knocking, the door shall be opened. Luke 11:8-10

We are to pray for others. I do not cease to give thanks for you, making mention of you in my prayers. Ephesians 1:16

So basically we are to pray in secret for other people to be blessed beyond expression. We are to pray for other people to be forgiven and filled with the fulness of our Father. Prayer really is all about the Holy Spirit using us to intercede for the needs of those around us, our loved ones, those who may not even know us, and even for those who don’t love us. Our Father knows what we need already, so prayer is about us being like our Head and living to help others. 

The beauty is that our Father will cause us to sow and reap. He has us living for others and that insures that we have life and have it abundantly, here and now and for all of eternity.