The nature of Norse religion was such that it did not lend itself to ritual. Like many religions, the Norse used myth to explain those events they could not otherwise explain; for instance thunder was caused by Thor striking his hammer; and lightning was the sparks flying from the hammer when it struck. Their religion, as was their lifestyle, tended to be violent. They believed that eventually, even their home after death, Valhalla, would suffer a turbulent and violent end. The closest they came to ritual was to call aloud the name of Woden, the chief of their Gods when in battle or any other dangerous situation. Your best source for Norse religion is probably the Viking Sagas. The link below hopefully will be helpful to you. You might also consider Magnus Magnusson's book, which has very helpful information.
http://members.shaw.ca/ladysaeunn/norse.htm http://norse-mythology.com/ http://www.enotes.com/topics/vikings