Angels are forms, images and expressions through which the essences and energy forces of God can be transmitted; and, since there are an infinite number of these forms, the greatest service anyone can pay the angelic host is never consciously to limit the ways angels might appear to us.
If you cannot meditate, you can repeat one simple word; this is good for the soul. Do not say anything else, just repeat the word over and over, innumerable times. Finally, it will lose all meaning, yet take on an entirely new significance. God will open the doors and you will find yourself using that simple word to say everything you wanted to say. Thus, routine work can be transformed into prayer.