The first thing I discovered many years ago when I believe the Bible and got “saved” is that we must pray and keep praying (Luke 18:1 and 1 Thessalonians 5:17 KJV).
That does not mean we have to kneel and pray many times a day. Daniel 6:10 says: “Now when Daniel knew that the writing was signed, he went into his house; and his windows being open in his chamber toward Jerusalem, he kneeled upon his knees three times a day, and prayed, and gave thanks before his God, as he did aforetime.” So praying regularly is important but does not have to be like a ritual.
If we need to get results from God (i.e. to know the will of God, not our own will as mentioned at John 5:30 ) we must pray. Prayer is about, I believe, us seeking to know what God already knows about our prayer requests and getting His will done from our prayers into our life and that of others (James 5:13-18).
And we need to pray again and again and again. James 5:17 says : “Elias was a man subject to like passions as we are, and he prayed earnestly that it might not rain: and it rained not on the earth by the space of three years and six months.”
From what I have seen over the years, when a saved person stops praying (at home, attending prayer meetings and praying, praying for other, etc) they will always eventually stop doing the things of God (i.e. stop keeping God’s Commandments) and/or become a “carnal Christian” (i.e. a Christian by name but not in holiness or substance). And often times they are the ones who (in different ways) seek to disturb others holiness life style and work for the kingdom of God. Then what eventually happens is full “backsliding” or just accepting a “religious lifestyle” while still attending Church.
To keep the prayer going for ones self, family members, relatives, friends, neighbors and so on, helps the person praying and the persons or situations they are praying about. Because when done in sincerity and faith in obedience to the word of God, it brings forth divine spiritual results and changes in many people life, in different ways, in the will of God.
Discouragement from not getting a prayer answered at all or in the way that was “expected” can hinder further or future prayer and praying by the person. But we must understand that, just like the Apostle Paul and others in the Bible, we must learn and practice to be subjected to the will of God (1 Thessalonians 2:18). Because often times we will see from God why that was his will from our prayers answered or not answered. Nevertheless, God answering our prayers will help to increase our faith in God as we grow in Christ (Luke 17:5-19 KJV).
So to keep the prayers going is the will of God until we at least hear and know from God.