1. Make very sure that your heart is clean before GOd by having given the Holy Spirit time to convict, should there be any unconfessed sin. 
   "If I regard iniquity in my heart the Lord will not hear me" Psalm 66:18, 139:23-24
    
2. Acknowledge that you cannot really pray without the direction and energy of the Holy Spirit.
   "The Spirit helps us in our weakness for we know not how to pray as we ought" Romans 8:26
    
3. Die to your own imaginations, desires, and burdens for what you feel you should pray
   "Lean not on your own understanding" Proverbs 3:4-6
    
4. Ask God to utterly control you by His Holy Spirit
   "Be filled with the Spirit" Ephesians 5:18
   Then thank Him for doing so
   "Without faith it is impossible to please Him" Hebrews 11:6
    
5. Praise Him now in faith for the remarkable prayer experience you are going to have. He is a remarkable God and will do something consistent with His character
    
6. Deal aggressively with the enemy. Come against him in the all-powerful name of the Lord Jesus Christ and with the "Sword of the Spirit" - the Word of God.
   "Submit yourself therefore to the Lord, resist the devil and he will flee from you" James 4:7
    
7. Wait in the silent expectancy. Then in obedience and faith, utter what God brings to your mind believing, 
   "My sheep hear My voice...and they follow Me" John 10:27
   
   Be sure not to move on to the next subject until you have given God sufficient time to discharge all He wants to say to you regarding this particular burden; especially when praying in a group
    
8. Always have your Bible with you should God want to give you directions or confirmation from it.
   "You Word is a lamp to my feet and a light to my path" Psalm 119:105
    
9. When God ceases to bring things to your mind for prayer, finish by praising and thanking Him for what He has done.
   "For from Him and through Him and to Him are all things. To Him be glory forever" Romans 11:36
    

A warning:

God knows the great weakness of the human heart toward pride, and if we speak of what God has revealed and done in prayer or intercession, it may lead to our committing this sin against God.
"God resists the proud, but gives grace to the humble" James 4:6

God shares His secrets and burdens with those who are able to keep them. There may come a time when He will definitely prompt us to share, but unless this happens, we should remain silent!
"And they kept silent and told no one in those days anything of what they had seen" Luke 9:35

"But Mary kept all these things and pondered them in her heart" ​​​​​​​Luke 2:19