In my personal experience, I feel each of us have our guardian angels while we are having physical life on this mighty Planet Earth.
Many times we get stuck in a situation and we feel absolutely blank. I have seen such a situation in my life and with my friends , and after sincere prayer to the universe we get some help from somewhere or an inspiring idea. Or we all experience intuition or commonly known is our 6th sense.
We receive healing while we are in our deep sleep and we get dejaVu experience from during our deep sleep. Omens are also indication of presence of god's angels.