Have you ever been in a room alone and suddenly a feeling of fear comes to you? What's happening in the realm of the spirit at such times is that a demon just stepped in to carry out a negative assignment on you.
What should you do? Rebuke him immediately. First say "I refuse to fear in the name of JESUS!" Then you say, "You devil of darkness GET OUT IN JESUS NAME!" After doing this, you will suddenly discover that the feeling of fear will be no more. What will happen next is that angels will come and attend to you. You will begin to feel a sense of peace and victory. After Jesus commanded Satan to leave him during His time of temptation the Bible says " Then the devil left him, and angels came and attended him." (Matthew 4:11)
On the other hand, have you ever had moments when you just have a good feeling and a deep sense of joy for no apparent reason? At such times, you feel happy but you can't really tell why. When that happens to you, just know that angels from Heaven have come to visit you. What should you do? First, receive them just like Lot received the angels in Genesis 19:1-3. How? By acknowledging their presence. You say, "Angels of God I acknowledge your presence in this place". Next you say, "I permit you to carry out your heavenly assignment in Jesus name". If at that time, there is a pressing issue, you say "I dispatch you to ... [you state what you want them to do] in Jesus name". When you do this, you will definitely see the physical manifestation of your heart's desire. God expects us to take advantage of the angels that He sends to us from time to time. God is asking "Are not all angels ministering spirits sent to serve those who will inherit salvation?" (Hebrews 1:14) Begin to take advantage of angelic visitations.