You can effectively calm the mind by focusing on something other than your busy thoughts.
Pattern will offer a relaxation process. A design familiar or one that requires concentration can draw the imagination away from problems or worries. In a plain setting pattern can be introduced in the form of a mosaic on pottary, a custom designed pillow or an area rug.
I particularly love tapestry which is a rich blend of woven patterns and subtle colors. Reflecting on designs can bring a sense of peace and harmony to any room.