I once heard that we should pray the scripture but without any depth explanation and archetype, thus what I did was only taking some verses from Psalms and trying to synthesize them into a prayer, it wasn't a bad approach but it lacks of contemplations and eventually leads me into a monotonous prayer.
For example, I always pick and pray these verses from Psalm and John before reading the bible:
"Incline my heart to Your testimonies, and not to dishonest gain. Turn my eyes away from looking at what is worthless, and revive me in Your ways." (Ps 119:36-37)
"Open my eyes, that I may behold wonderful things from Your Law." (Ps 119:18)
"Teach me Your way, Lord; I will walk in Your truth; Unite my heart to fear Your name." (Ps 86:11)
"Satisfy us in the morning with Your graciousness, that we may sing for joy and rejoice all our days." (Ps 90:14)
"Satisfy us in the morning with Your graciousness, that we may sing for joy and rejoice all our days." (Ps 119:38)
"Sanctify them (I change to the pronoun to me) in the truth; Your word is truth." (John 17:17)
Then I construct them into a prayer, but without depth meditations on each verses, just repeating them based on my memorization skill.
But this book's approach is exactly what I need to emulate in my prayer life, it really shows me that praying for 15 minutes, 30, or even an hour is possible without me have to struggle really hard on what to pray, how to pray, and how to avoid repetitions that will cause of boredom in my prayer and sense of failure.
We love because He first loved us (1 John 4:19), and with the same pattern, we communicate to God because He first communicated to us. We will never be able to understand God unless He reveals Himself in both general and special revelations. So He needs to communicate first to us and shows us the pattern on how to communicate with Him, in Spirit and Truth (John 4:24).
He even made it possible for us to approach the throne of Grace by giving His Son as our only Mediator between us and the Father, so we can communicate with Him.
And moreover, Christ intercedes for us in the heavenly throne (Romans 8:34) and Holy Spirit also helps us how to pray because we don't know how to pray (Romans 8:26).
God the Father gave us His Son so we can approach His throne and communicate with Him.
God the Son gave us Himself as our propitiation in His vicarious atonement on the cross so we can communicate with the Father.
God the Spirit adopts us and also empowers us to call the Father "Abba Father" in our groaning communication with Him.
Prayer should not be boring, but if it is, and if we have the Holy Spirit in us; it is our method that is wrong.