In honor of this great holiday, don't forget to put on your horned helmets, animal skins and go out pillaging and plundering.
Once your done with all that strenuous plundering, don't forget to kick back with your spoils (Pizza and Mt. Dew is also acceptable) and relive the glory with a nice viking rpg adventure.
Vikings RPG
Greenland Saga
Viking Age RPG
Vikings-Midgard
Some more viking goodies for your game at RPGNow