Psalm 19 tells us that the Heavens declare the glory of God, and the firmament reveals his handiwork. I find that we can use the physical universe to remind us of God presence and thus prayer. St. Paul's use of the clothing of the Roman soldier to illustrate the putting on of the "armour of God," is such an example. (See Ephesians 6.11-20)
If you are making something you must call to mind the Creator of all things; if you see the light, remember the Giver of it. If you put on your clothes, recall whose gift they are and thank Him who provides for your life. In short, let every action be a cause of your remembering and praising God, and lo! you will be praying without ceasing and therein your soul will always rejoice.
~St. Peter of Damascus