Psalm 37

The Psalter, the collection of 150 Psalms of David and other authors, is, in my estimation, the best "prayer book" around.  Every situation, every emotion or need we experience, has already be experienced and reflected upon by these prayerful writers who both affirm what we are going through or offering sound advice, through the Holy Spirit, to help us face our situation.  Psalm 37 is a long and rich psalm that can serve as fodder for meditation for days.  For example, the first 9 verses are rich in wisdom, comfort and assurance:
Do not fret because of evildoers,
Be not envious toward wrongdoers.
For they will wither quickly like the grass
And fade like the green herb.
Trust in the Lord and do good;
Dwell in the land and cultivate faithfulness.
Delight yourself in the Lord;
And He will give you the desires of your heart.
Commit you way to the Lord,
Trust also in Him, and He will do it.
He will bring forth your righteousness as the light
And your judgment as the noonday.
Rest in the Lord and wait patiently for him;
Do not fret because of him who prospers in his way,
Because of the man who carries out wicked schemes.
Cease from anger, and forsake wrath;
Do not fret; it leads only to evildoing. Ps 37: 1-9)

If something leaps out at you, then stick with it; this is how you nourish your soul.
Bro. Rene