How do you begin your prayers? I suspect King David and the Holy Spirit inspiring him were not simply speaking of entering the formal temple when they gave us the 100th Psalm. Verse 2 shows us that the psalm is about coming into the presence of the Lord. Verse 4 might well be applied to beginning prayers.
“Enter his gates with thanksgiving, and his courts with praise!”
Discipline yourself to spend time praising God before you do anything else in your private prayers. You will find that changes the whole tenor of your prayers.