While I am not a huge fan of repetitive prayer in any format, I do think there are certain areas where our faith humanly speaking, has a tendency to falter.    Fear and Worry happen to be biggies for me at times and I think a little preaching to myself, (actually just reading the right scriptures out loud) bolsters my faith.   The original verses are listed at the bottom for reference.   The repetitiveness that you notice is simply echoing the original verses, apparently God really wants us to understand just how completely He watches over us (Psalm 121 is especially wonderful as it points out that the Lord Himself does this without rest or slumber).

Scriptures to mediate on the Lord Our Protection

Dear Heavenly Father, Lord of Lords, Faithful Shield, Loving Father, Ruler Supreme above all Who Surround Your throne, Thank you for the protection you provide for us on every side, everywhere we go, at all times, day and night.

Thank you that as we look to You, and you alone for our protection, that You surround us day and night, without slumber or rest, with an impenetrable shield of Love, Your wall of Fire, Your eternal and never failing faithfulness and for sending Your angels to guard us so completely that we cannot even strike our foot on a stone.  Thank You Lord Jesus Christ for restoring us, that we are now the righteousness of God, and that even our bones are protected due to Your sacrifice.  Day and Night, You keep us completely secure from all harm and protect from every snare, trap, hurt, harm, plan of the evil one.   Thank you that the Angel of the Lord guards all who fear You.  We have nothing to fear as You are with us (you both proceed and follow us, and your glory securely protects us from behind).  No evil shall befall us, and no plague shall come near our dwelling place.

Praise the Lord who is our Rock, the Guardian of our lives and the lives of our little ones, our loving Ally, our Rescuer, our Fortress and Tower of safety and strength and in whom we can always take refuge and rest.   You train and equip us for every battle in strength, wisdom and skill.  You and you alone O Lord, are our triumphant sword, not by human strength, weapons, knowledge but by Your Spirit and Your Power and Might do we will stand triumphant over every enemy. It is Your victorious right hand that holds us up.  Where we have been taken captive, You release us.  Where we have been plundered, You restore us for You have freed Your people.   Thank you that You fight those who fight us and You save our children.   Our enemies now cringe before us, knowing that in You, we will tramp on their backs and they are forced to submit to us as we walk in obedience to Your Word and will. 

Praise You Lord, Lord of Hosts, Defender of the weak, the poor and helpless, that You are leading us through the wilderness and the field of testing and temptation to the promise land and the fullness of Your heavenly kingdom.   Thank you that we will find rest on every side and be delivered first into a season and then into an eternity of absolute peace. 

You are worthy of great praise and thanksgiving Oh Lord, Restorer, Redeemer and Sanctifier of our lives.  In You we lay down in complete safety, our sleep is sound sweet and we wake to the sweet assurances of Your promises and Your Word.

Thank you that Your perfect love is delivering us and freeing us from all fear, worry, anxiety, stress and dread.

Amen

[Psalm 5:12, 2 Samuel 22:30-31,  Psalm 91:10-12, Psalm 34:7, Isaiah 58:8, Isaiah 41:10, Jeremiah 31:26, Proverbs 3:24, Psalm 18:28, Psalm 144:1-2, Zecharaiah 2:5, 2 Thessalonians 3:3-5, Joshua 1:9, Psalm 121:3-8, Colossians 1:12-14, Deuteronomy 33:29, Hosea 1:7, Isaiah 49:25, Joshua 21:43-45, Psalm 3:5-6, Psalm 34:15-20, Psalm 56:9, 2 Samuel 22:30-31, 2 Timothy 4:18, 1 John 4:18]